In this post, I will give a list of all undocumented parameters in Oracle 12.1.0.1c. Here is a query to see all the parameters (documented and undocumented) which contain the string you enter when prompted:

– Enter name of the parameter when prompted

SET linesize 235
col Parameter FOR a50
col SESSION FOR a28
col Instance FOR a55
col S FOR a1
col I FOR a1
col D FOR a1
col Description FOR a90

SELECT 
  a.ksppinm  "Parameter",
  decode(p.isses_modifiable,'FALSE',NULL,NULL,NULL,b.ksppstvl) "Session",
  c.ksppstvl "Instance",
  decode(p.isses_modifiable,'FALSE','F','TRUE','T') "S",
  decode(p.issys_modifiable,'FALSE','F','TRUE','T','IMMEDIATE','I','DEFERRED','D') "I",
  decode(p.isdefault,'FALSE','F','TRUE','T') "D",
  a.ksppdesc "Description"
FROM x$ksppi a, x$ksppcv b, x$ksppsv c, v$parameter p
WHERE a.indx = b.indx AND a.indx = c.indx
  AND p.name(+) = a.ksppinm
  AND UPPER(a.ksppinm) LIKE UPPER('%&1%')
ORDER BY a.ksppinm;

Enter value for 1:

Here is the list of all (2984) undocumented parameters in Oracle 12.1.0.1c :

SQL>     col parameter for a15 word_wrapped
col Description for a55 word_wrapped
set pagesize 50000
set linesize 80
select upper(KSPPINM) parameter,   ' : ',
KSPPDESC Description from x$ksppi
where substr(ksppinm,1,1) = '_'order by 1,3;

PARAMETER DESCRIPTION
————— ——————————————————-
_4030_DUMP_BITV : bitvec to specify dumps prior to 4030 error
EC

_4031_DUMP_BITV : bitvec to specify dumps prior to 4031 error
EC

_4031_DUMP_INTE : Dump 4031 error once for each n-second interval
RVAL

_4031_MAX_DUMPS : Maximum number of 4031 dumps for this process
_4031_SGA_DUMP_ : Dump 4031 SGA heapdump error once for each n-second
INTERVAL interval

_4031_SGA_MAX_D : Maximum number of SGA heapdumps
UMPS

_ABORT_ON_MRP_C : abort database instance when MRP crashes
RASH

_ABORT_RECOVERY : if TRUE, abort recovery on join reconfigurations
_ON_JOIN

_ACCEPT_VERSION : List of parameters for rolling operation
S

_ACTIVE_INSTANC : number of active instances in the cluster database
E_COUNT

_ACTIVE_SESSION : active session idle limit
_IDLE_LIMIT

_ACTIVE_SESSION : active session legacy behavior
_LEGACY_BEHAVIO
R

_ACTIVE_STANDBY : if TRUE optimize dlm reconfiguration for active/standby
_FAST_RECONFIGU OPS
RATION

_AC_ENABLE_DSCN : Enable Dependent Commit SCN tracking
_IN_RAC

_ADAPTIVE_DIREC : Adaptive Direct Read
T_READ

_ADAPTIVE_DIREC : Adaptive Direct Write
T_WRITE

_ADAPTIVE_FETCH : enable/disable adaptive fetch in parallel group by
_ENABLED

_ADAPTIVE_LOG_F : Threshold for frequent log file sync mode switches (per
ILE_SYNC_HIGH_S minute)
WITCH_FREQ_THRE
SHOLD

_ADAPTIVE_LOG_F : Polling interval selection bias (conservative=0,
ILE_SYNC_POLL_A aggressive=100)
GGRESSIVENESS

_ADAPTIVE_LOG_F : Window (in seconds) for measuring average scheduling
ILE_SYNC_SCHED_ delay
DELAY_WINDOW

_ADAPTIVE_LOG_F : Ratio of redo synch time to expected poll time as a
ILE_SYNC_USE_PO percentage
LLING_THRESHOLD

_ADAPTIVE_LOG_F : Percentage of foreground load from when post/wait was
ILE_SYNC_USE_PO last used
STWAIT_THRESHOL
D

_ADAPTIVE_SCALA : Percentage of overlap across multiple outstanding
BLE_LOG_WRITER_ writes
DISABLE_WORKER_
THRESHOLD

_ADAPTIVE_SCALA : Increase in redo generation rate as a percentage
BLE_LOG_WRITER_
ENABLE_WORKER_T
HRESHOLD

_ADAPTIVE_WINDO : enable/disable adaptive window consolidator PX plan
W_CONSOLIDATOR_
ENABLED

_ADDM_AUTO_ENAB : governs whether ADDM gets run automatically after every
LE AWR snapshot

_ADDM_SKIPRULES : comma-separated list of ADDM nodes to skip
_ADDM_VERSION_C : governs whether ADDM checks the input AWR snapshot
HECK version

_ADD_COL_OPTIM_ : Allows new add column optimization
ENABLED

_ADD_NULLABLE_C : Allows add of a nullable column with default
OLUMN_WITH_DEFA optimization
ULT_OPTIM

_ADD_STALE_MV_T : add stale mv to dependency list
O_DEPENDENCY_LI
ST

_ADD_TRIM_FOR_N : add trimming for fixed char semantics
LSSORT

_ADG_BUFFER_WAI : Active Dataguard buffer wait time in cs
T_TIMEOUT

_ADG_INSTANCE_R : enable ADG instance recovery
ECOVERY

_ADJUST_LITERAL : If TRUE, we will adjust the SQL/PLUS output
_REPLACEMENT

_ADR_MIGRATE_RU : Enable/disable ADR Migrate Runonce action
NONCE

_ADVANCED_INDEX : advanced index compression options
_COMPRESSION_OP
TIONS

_ADVANCED_INDEX : advanced index compression options2
_COMPRESSION_OP
TIONS_VALUE

_ADVANCED_INDEX : advanced index compression trace
_COMPRESSION_TR
ACE

_AFFINITY_ON : enable/disable affinity at run time
_AGED_OUT_CURSO : number of seconds an aged out session cached cursor
R_CACHE_TIME stay in cache

_AGGREGATION_OP : settings for aggregation optimizations
TIMIZATION_SETT
INGS

_AIOWAIT_TIMEOU : Number of aiowait timeouts before error is reported
TS

_ALERT_EXPIRATI : seconds before an alert message is moved to exception
ON queue

_ALERT_MESSAGE_ : Enable Alert Message Cleanup
CLEANUP

_ALERT_MESSAGE_ : Enable Alert Message Purge
PURGE

_ALERT_POST_BAC : Enable Background Alert Posting
KGROUND

_ALLOCATE_CREAT : should files be examined in creation order during
ION_ORDER allocation

_ALLOCATION_UPD : interval at which successful search in L1 should be
ATE_INTERVAL updated

_ALLOW_CELL_SMA : Allow checking smart_scan_capable Attr
RT_SCAN_ATTR

_ALLOW_COMMUTAT : allow for commutativity of +, * when comparing
IVITY expressions

_ALLOW_COMPATIB : allow advancing DB compatibility with guaranteed
ILITY_ADV_W_GRP restore points

_ALLOW_DROP_SNA : Allow dropping snapshot standby guaranteed restore
PSHOT_STANDBY_G point
RSP

_ALLOW_DROP_TS_ : Allow drop Tablespace with guaranteed restore points
WITH_GRP

_ALLOW_ERROR_SI : Allow error simulation for testing
MULATION

_ALLOW_FILE_1_O : don’t signal ORA-1245 due to file 1 being offline
FFLINE_ERROR_12
45

_ALLOW_LEVEL_WI : allow level without connect by
THOUT_CONNECT_B
Y

_ALLOW_READ_ONL : allow read-only open even if database is corrupt
Y_CORRUPTION

_ALLOW_RESETLOG : allow resetlogs even if it will cause corruption
S_CORRUPTION

_ALLOW_TERMINAL : Finish terminal recovery even if it may cause
_RECOVERY_CORRU corruption
PTION

_ALL_SHARED_DBL : treat all dblinks as shared
INKS

_ALTERNATE_IOT_ : enable alternate index-organized table leaf-block
LEAF_BLOCK_SPLI split-points
T_POINTS

_ALTER_COMMON_U : allow local user to create objects in common schema
SER_SCHEMA

_ALWAYS_ANTI_JO : always use this method for anti-join when possible
IN

_ALWAYS_SEMI_JO : always use this method for semi-join when possible
IN

_ALWAYS_STAR_TR : always favor use of star transformation
ANSFORMATION

_AM_CONTAINER_F : allocation unit size for non-ASM containers
ILESYSTEM_AUSIZ
E

_AM_MAX_CONTAIN : maximum number of containers
ERS

_AM_MAX_GROUPS : maximum number of containers
_AM_MAX_SEG_BYT : maximum number of bytes per array segment
ES

_AM_TIMEOUTS_EN : enable timeouts
ABLED

_AM_TRACE_BUFFE : size of per-process I/O trace buffer
R_SIZE

_AND_PRUNING_EN : allow partition pruning based on multiple mechanisms
ABLED

_APPQOS_CDB_SET : QoSM CDB Performance Class Setting
TING

_APPQOS_PO_MULT : Multiplier for PC performance objective value
IPLIER

_APPQOS_QT : System Queue time retrieval interval
_AQSHARDED_CACH : Limit for cached enqueue/dequeue operations
E_LIMIT

_AQ_DISABLE_X : AQ – Disable new cross processes at an instance
_AQ_DQ_SESSIONS : Deq session count
_AQ_EQ_SESSIONS : Enq session count
_AQ_INIT_SHARDS : Minimum enqueue shards per queue at an instance
_AQ_MAX_SCAN_DE : Maximum allowable scan delay for AQ indexes and IOTs
LAY

_AQ_PRECRT_PART : Precreate Partitions
ITIONS

_AQ_PT_PROCESSE : Partition background processes
S

_AQ_STOP_BACKGR : Stop all AQ background processes
OUNDS

_AQ_SUBSHARD_SI : Sub Shard Size
ZE

_AQ_TM_DEQCOUNT : dequeue count interval for Time Managers to cleanup DEQ
INTERVAL IOT BLOCKS

_AQ_TM_SCANLIMI : scan limit for Time Managers to clean up IOT
T

_AQ_TM_STATISTI : statistics collection window duration
CS_DURATION

_ARCH_COMPRESSI : archive compression enabled
ON

_ARCH_COMPRESS_ : enable/disable row checksums for archive compressed
CHECKSUMS blocks

_ARCH_COMP_DBG_ : archive compression scan debug
SCAN

_ARCH_COMP_DEC_ : decompress archive compression blocks for checking and
BLOCK_CHECK_DUM dumping
P

_ARCH_IO_SLAVES : ARCH I/O slaves
_ARCH_SIM_MODE : Change behavior of local archiving
_ARRAY_CDB_VIEW : array mode enabled for CDB views
_ENABLED

_ARRAY_UPDATE_V : Enable array update vector read
ECTOR_READ_ENAB
LED

_ASH_COMPRESSIO : To enable or disable string compression in ASH
N_ENABLE

_ASH_DISK_FILTE : Ratio of the number of in-memory samples to the number
R_RATIO of samples actually written to disk

_ASH_DISK_WRITE : To enable or disable Active Session History flushing
_ENABLE

_ASH_DUMMY_TEST : Oracle internal dummy ASH parameter used ONLY for
_PARAM testing!

_ASH_EFLUSH_TRI : The percentage above which if the in-memory ASH is full
GGER the emergency flusher will be triggered

_ASH_ENABLE : To enable or disable Active Session sampling and
flushing

_ASH_MIN_MMNL_D : Minimum Time interval passed to consider MMNL Dump
UMP

_ASH_SAMPLE_ALL : To enable or disable sampling every connected session
including ones waiting for idle waits

_ASH_SAMPLING_I : Time interval between two successive Active Session
NTERVAL samples in millisecs

_ASH_SIZE : To set the size of the in-memory Active Session History
buffers

_ASMSID          : ASM instance id
_ASM_ACCESS      : ASM File access mechanism
_ASM_ACD_CHUNKS : initial ACD chunks created
_ASM_ADMIN_WITH : Does the sysdba role have administrative privileges on
_SYSDBA             ASM?

_ASM_ALLOWDEGEN : Allow force-mounts of DGs w/o proper quorum
ERATEMOUNTS

_ASM_ALLOW_APPL : Allow DROP DISK/FAILUREGROUP NOFORCE on ASM Appliances
IANCE_DROPDISK_
NOFORCE

_ASM_ALLOW_LVM_ : Enable disk resilvering for external redundancy
RESILVERING

_ASM_ALLOW_ONLY : Discovery only raw devices
_RAW_DISKS

_ASM_ALLOW_SYST : if system alias renaming is allowed
EM_ALIAS_RENAME

_ASM_ALLOW_UNSA : attempt unsafe reconnect to ASM
FE_RECONNECT

_ASM_APPLIANCE_ : Appliance configuration file name
CONFIG_FILE

_ASM_AUSIZE : allocation unit size
_ASM_AUTOMATIC_ : automatically rebalance free space across zones
REZONE

_ASM_AVOID_PST_ : Avoid PST Scans
SCANS

_ASM_BLKSIZE : metadata block size
_ASM_CHECK_FOR_ : check for misbehaving CF-holding clients
MISBEHAVING_CF_
CLIENTS

_ASM_COMPATIBIL : default ASM compatibility level
ITY

_ASM_DBA_BATCH : ASM Disk Based Allocation Max Batch Size
_ASM_DBA_SPCCHK : ASM Disk Based Allocation Space Check Threshold
_THLD

_ASM_DBA_THRESH : ASM Disk Based Allocation Threshold
OLD

_ASM_DBMSDG_NOH : dbms_diskgroup.checkfile does not check block headers
DRCHK

_ASM_DIAG_DEAD_ : diagnostics for dead clients
CLIENTS

_ASM_DIRECT_CON : Expire time for idle direct connection to ASM instance
_EXPIRE_TIME

_ASM_DISABLE_AM : Disable AMDU dump
DU_DUMP

_ASM_DISABLE_AS : disable async intra-instance messaging
YNC_MSGS

_ASM_DISABLE_MU : Disable checking for multiple ASM instances on a given
LTIPLE_INSTANCE node
_CHECK

_ASM_DISABLE_PR : disable profile query for discovery
OFILEDISCOVERY

_ASM_DISABLE_SM : Do Not create smr
R_CREATION

_ASM_DISABLE_UF : disable ufg member kill
GMEMBERKILL

_ASM_DISABLE_UF : disable terminated umbilicus diagnostic
G_DUMP

_ASM_DISKERR_TR : Number of read/write errors per disk a process can
ACES trace

_ASM_DISKGROUPS : disk groups to mount automatically set 2
2

_ASM_DISKGROUPS : disk groups to mount automatically set 3
3

_ASM_DISKGROUPS : disk groups to mount automatically set 4
4

_ASM_DISK_REPAI : seconds to wait before dropping a failing disk
R_TIME

_ASM_EMULATE_NF : Emulate NFS disk test event
S_DISK

_ASM_EMULMAX : max number of concurrent disks to emulate I /O errors
_ASM_EMULTIMEOU : timeout before emulation begins (in 3s ticks)
T

_ASM_ENABLE_XRO : Enable XROV capability
V

_ASM_EVENREAD : ASM Even Read level
_ASM_EVENREAD_A : ASM Even Read Alpha
LPHA

_ASM_EVENREAD_A : ASM Even Read Second Alpha
LPHA2

_ASM_EVENREAD_F : ASM Even Read Fast Start Threshold
ASTSTART

_ASM_FAIL_RANDO : Randomly fail some RX enqueue gets
M_RX

_ASM_FOB_TAC_FR : Timeout frequency for FOB cleanup
EQUENCY

_ASM_FORCE_QUIE : Force diskgroup quiescing
SCE

_ASM_GLOBAL_DUM : System state dump level for ASM asserts
P_LEVEL

_ASM_HBEATIOWAI : number of secs to wait for PST Async Hbeat IO return
T

_ASM_HBEATWAITQ : quantum used to compute time-to-wait for a PST Hbeat
UANTUM check

_ASM_HEALTHCHEC : seconds until health check takes action
K_TIMEOUT

_ASM_IMBALANCE_ : hundredths of a percentage of inter-disk imbalance to
TOLERANCE tolerate

_ASM_INSTLOCK_Q : ASM Instance Lock Quota
UOTA

_ASM_IOSTAT_LAT : ASM I/O statistics latch count
CH_COUNT

_ASM_KFDPEVENT : KFDP event
_ASM_KILL_UNRES : kill unresponsive ASM clients
PONSIVE_CLIENTS

_ASM_LIBRARIES : library search order for discovery
_ASM_LOG_SCALE_ : Rebalance power uses logarithmic scale
REBALANCE

_ASM_LSOD_BUCKE : ASM lsod bucket size
T_SIZE

_ASM_MAXIO : Maximum size of individual I/O request
_ASM_MAX_COD_ST : maximum number of COD strides
RIDES

_ASM_MAX_REDO_B : asm maximum redo buffer size
UFFER_SIZE

_ASM_NETWORKS : ASM network subnet addresses
_ASM_NETWORK_TI : Keepalive timeout for ASM network connections
MEOUT

_ASM_NODEKILL_E : secs until escalating to nodekill if fence incomplete
SCALATE_TIME

_ASM_NOEVENREAD : List of disk groups having even read disabled
_DISKGROUPS

_ASM_PARTNER_TA : target maximum number of disk partners for repartnering
RGET_DISK_PART

_ASM_PARTNER_TA : target maximum number of failure group relationships
RGET_FG_REL for repartnering

_ASM_PRIMARY_LO : Number of cycles/extents to load for non-mirrored files
AD

_ASM_PRIMARY_LO : True if primary load is in cycles, false if extent
AD_CYCLES counts

_ASM_PROCS_TRAC : Number of processes allowed to trace a disk failure
E_DISKERR

_ASM_PROXY_STAR : Maximum time to wait for ASM proxy connection
TWAIT

_ASM_RANDOM_ZON : Random zones for new files
E

_ASM_REBALANCE_ : maximum rebalance work unit
PLAN_SIZE

_ASM_REBALANCE_ : number of out of space errors allowed before aborting
SPACE_ERRORS rebalance

_ASM_REMOTE_CLI : timeout before killing disconnected remote clients
ENT_TIMEOUT

_ASM_REPAIRQUAN : quantum (in 3s) used to compute elapsed time for disk
TUM drop

_ASM_RESERVE_SL : reserve ASM slaves for CF txns
AVES

_ASM_RESYNCCKPT : number of extents to resync before flushing checkpoint
_ASM_ROOT_DIREC : ASM default root directory
TORY

_ASM_RUNTIME_CA : runtime capability for volume support returns supported
PABILITY_VOLUME
_SUPPORT

_ASM_SCRUB_LIMI : ASM disk scrubbing power
T

_ASM_SECONDARY_ : Number of cycles/extents to load for mirrored files
LOAD

_ASM_SECONDARY_ : True if secondary load is in cycles, false if extent
LOAD_CYCLES counts

_ASM_SERIALIZE_ : Serialize volume rebalance
VOLUME_REBALANC
E

_ASM_SHADOW_CYC : Inverse shadow cycle requirement
LE

_ASM_SKIP_DISKV : skip client side discovery for disk revalidate
AL_CHECK

_ASM_SKIP_RENAM : skip the checking of the clients for s/w compatibility
E_CHECK for rename

_ASM_SKIP_RESIZ : skip the checking of the clients for s/w compatibility
E_CHECK for resize

_ASM_STORAGEMAY : PST Split Possible
SPLIT

_ASM_STRIPESIZE : ASM file stripe size
_ASM_STRIPEWIDT : ASM file stripe width
H

_ASM_SYNC_REBAL : Rebalance uses sync I/O
ANCE

_ASM_TRACE_LIMI : Time-out in milliseconds to reset the number of traces
T_TIMEOUT per disk and the number of processes allowed to trace

_ASM_USD_BATCH   : ASM USD Update Max Batch Size
_ASM_WAIT_TIME   : Max/imum time to wait before asmb exits
_ASSM_DEFAULT    : ASSM default
_ASSM_FORCE_FET : enable metadata block fetching in ASSM segment scan
CHMETA

_ASSM_HIGH_GSP_ : Number of blocks rejected before growing segment
THRESHOLD

_ASSM_LOW_GSP_T : Number of blocks rejected before collecting stats
HRESHOLD

_ASYNC_RECOVERY : if TRUE, issue recovery claims asynchronously
_CLAIMS

_ASYNC_RECOVERY : if TRUE, issue recovery reads asynchronously
_READS

_ASYNC_TS_THRES : check tablespace thresholds asynchronously
HOLD

_AUTOMATIC_MAIN : Enable AUTOTASK Test Mode
TENANCE_TEST

_AUTOMEMORY_BRO : memory broker statistics gathering interval for auto
KER_INTERVAL memory

_AUTOTASK_MAX_W : Maximum Logical Maintenance Window Length in minutes
INDOW

_AUTOTASK_MIN_W : Minimum Maintenance Window Length in minutes
INDOW

_AUTOTASK_TEST_ : Name of current Autotask Test (or test step)
NAME

_AUTOTUNE_GTX_I : idle time to trigger auto-shutdown a gtx background
DLE_TIME process

_AUTOTUNE_GTX_I : interval to autotune global transaction background
NTERVAL processes

_AUTOTUNE_GTX_T : auto-tune threshold for degree of global transaction
HRESHOLD concurrency

_AUTO_ASSIGN_CG : auto assign CGs for sessions
_FOR_SESSIONS

_AUTO_BMR : enable/disable Auto BMR
_AUTO_BMR_BG_TI : Auto BMR Process Run Time
ME

_AUTO_BMR_FC_TI : Auto BMR Flood Control Time
ME

_AUTO_BMR_PUB_T : Auto BMR Publish Timeout
IMEOUT

_AUTO_BMR_REQ_T : Auto BMR Requester Timeout
IMEOUT

_AUTO_BMR_SESS_ : Auto BMR Request Session Threshold
THRESHOLD

_AUTO_BMR_SYS_T : Auto BMR Request System Threshold
HRESHOLD

_AUTO_MANAGE_EN : perodically check for OFFLINE disks and attempt to
ABLE_OFFLINE_CH ONLINE
ECK

_AUTO_MANAGE_EX : Automate Exadata disk management
ADATA_DISKS

_AUTO_MANAGE_IN : TEST: Set infrequent timeout action to run at this
FREQ_TOUT interval, unit is seconds

_AUTO_MANAGE_IO : oss_ioctl buffer size, to read and respond to cell
CTL_BUFSZ notifications

_AUTO_MANAGE_MA : Max. attempts to auto ONLINE an ASM disk
X_ONLINE_TRIES

_AUTO_MANAGE_NU : Max. number of out-standing msgs in the KXDAM pipe
M_PIPE_MSGS

_AUTO_MANAGE_NU : Num. tries before giving up on a automation operation
M_TRIES

_AUTO_MANAGE_ON : Allow Max. attempts to auto ONLINE an ASM disk after
LINE_TRIES_EXPI lapsing this time (unit in seconds)
RE_TIME

_AUX_DFC_KEEP_T : auxiliary datafile copy keep time in minutes
IME

_AVAILABLE_CORE : number of cores for this instance
_COUNT

_AVOID_PREPARE : if TRUE, do not prepare a buffer when the master is
local

_AWR_CDBPERF_TH : Setting for AWR CDBPERF Threshold
RESHOLD

_AWR_CORRUPT_MO : AWR Corrupt Mode
DE

_AWR_DISABLED_F : Disable flushing of specified AWR tables
LUSH_TABLES

_AWR_FLUSH_THRE : Enable/Disable Flushing AWR Threshold Metrics
SHOLD_METRICS

_AWR_FLUSH_WORK : Enable/Disable Flushing AWR Workload Metrics
LOAD_METRICS

_AWR_MMON_CPUUS : Enable/disable AWR MMON CPU Usage Tracking
AGE

_AWR_MMON_DEEP_ : Allows deep purge to purge AWR data for all expired
PURGE_ALL_EXPIR snapshots
ED

_AWR_MMON_DEEP_ : Set extent of rows to check each deep purge run
PURGE_EXTENT

_AWR_MMON_DEEP_ : Set interval for deep purge of AWR contents
PURGE_INTERVAL

_AWR_MMON_DEEP_ : Set max number of rows per table to delete each deep
PURGE_NUMROWS purge run

_AWR_PDB_REGIST : Parameter to enable/disable AWR PDB Registration
RATION_ENABLED

_AWR_REMOTE_TAR : AWR Remote Target DBLink for Flushing
GET_DBLINK

_AWR_RESTRICT_M : AWR Restrict Mode
ODE

_AWR_SQL_CHILD_ : Setting for AWR SQL Child Limit
LIMIT

_BACKUP_ALIGN_W : align backup write I/Os
RITE_IO

_BACKUP_AUTOMAT : automatic retry on backup write errors
IC_RETRY

_BACKUP_DISK_BU : number of buffers used for DISK channels
FCNT

_BACKUP_DISK_BU : size of buffers used for DISK channels
FSZ

_BACKUP_DISK_IO : BACKUP Disk I/O slaves
_SLAVES

_BACKUP_DYNAMIC : dynamically compute backup/restore buffer sizes
_BUFFERS

_BACKUP_ENCRYPT : specifies encryption block optimization mode
_OPT_MODE

_BACKUP_FILE_BU : number of buffers used for file access
FCNT

_BACKUP_FILE_BU : size of buffers used for file access
FSZ

_BACKUP_IO_POOL : memory to reserve from the large pool
_SIZE

_BACKUP_KGC_BLK : specifies buffer size to be used by HIGH compression
SIZ

_BACKUP_KGC_BUF : specifies buffer size to be used by BASIC compression
SZ

_BACKUP_KGC_MEM : specifies memory level for MEDIUM compression
LEVEL

_BACKUP_KGC_NIT : specifies number of iterations done by BASIC
ERS compression

_BACKUP_KGC_PER : specifies compression (performance) level for MEDIUM
FLEVEL compression

_BACKUP_KGC_SCH : specifies compression scheme
EME

_BACKUP_KGC_TYP : specifies compression type used by kgc BASIC
E compression

_BACKUP_KGC_WIN : specifies window size for MEDIUM compression
DOWBITS

_BACKUP_KSFQ_BU : number of buffers used for backup/restore
FCNT

_BACKUP_KSFQ_BU : maximum amount of memory (in bytes) used for buffers
FMEM_MAX for backup/restore

_BACKUP_KSFQ_BU : size of buffers used for backup/restore
FSZ

_BACKUP_LZO_SIZ : specifies buffer size for LOW compression
E

_BACKUP_MAX_GAP : largest gap in an incremental/optimized backup buffer,
_SIZE in bytes

_BACKUP_MIN_CT_ : mimimun size in bytes of change tracking to apply
UNUSED_OPTIM unused space optimuzation

_BACKUP_SEQ_BUF : number of buffers used for non-DISK channels
CNT

_BACKUP_SEQ_BUF : size of buffers used for non-DISK channels
SZ

_BCT_BITMAPS_PE : number of bitmaps to store for each datafile
R_FILE

_BCT_BUFFER_ALL : maximum size of all change tracking buffer allocations,
OCATION_MAX in bytes

_BCT_BUFFER_ALL : mininum number of extents to allocate per buffer
OCATION_MIN_EXT allocation
ENTS

_BCT_BUFFER_ALL : size of one change tracking buffer allocation, in bytes
OCATION_SIZE

_BCT_CHUNK_SIZE : change tracking datafile chunk size, in bytes
_BCT_CRASH_RESE : change tracking reserved crash recovery SGA space, in
RVE_SIZE bytes

_BCT_FILE_BLOCK : block size of change tracking file, in bytes
_SIZE

_BCT_FILE_EXTEN : extent size of change tracking file, in bytes
T_SIZE

_BCT_FIXTAB_FIL : change tracking file for fixed tables
E

_BCT_HEALTH_CHE : CTWR health check interval (seconds), zero to disable
CK_INTERVAL

_BCT_INITIAL_PR : initial number of entries in the private change
IVATE_DBA_BUFFE tracking dba buffers
R_SIZE

_BCT_MRP_TIMEOU : CTWR MRP wait timeout (seconds), zero to wait forever
T

_BCT_PUBLIC_DBA : allow dynamic resizing of public dba buffers, zero to
_BUFFER_DYNRESI disable
ZE

_BCT_PUBLIC_DBA : max buffer size permitted for public dba buffers, in
_BUFFER_MAXSIZE bytes

_BCT_PUBLIC_DBA : total size of all public change tracking dba buffers,
_BUFFER_SIZE in bytes

_BG_SPAWN_DIAG_ : background processes spawn diagnostic options
OPTS

_BITMAP_OR_IMPR : controls extensions to partition pruning for general
OVEMENT_ENABLED predicates

_BLOCKING_SESS_ : blocking session graph cache size in bytes
GRAPH_CACHE_SIZ
E

_BLOCKS_PER_CAC : number of consecutive blocks per global cache server
HE_SERVER

_BLOCK_LEVEL_OF : High Latency Threshold for Block Level Offload
FLOAD_HIGH_LAT_ operations
THRESH

_BLOCK_SAMPLE_R : controls readahead value during block sampling
EADAHEAD_PROB_T
HRESHOLD

_BLOOM_FILTER_D : debug level for bloom filtering
EBUG

_BLOOM_FILTER_E : enables or disables bloom filter
NABLED

_BLOOM_FILTER_S : bloom filter vector size (in KB)
IZE

_BLOOM_FOLDING_ : bloom filter folding density lower bound
DENSITY

_BLOOM_FOLDING_ : Enable folding of bloom filter
ENABLED

_BLOOM_FOLDING_ : bloom filter folding size lower bound (in KB)
MIN

_BLOOM_MAX_SIZE : maximum bloom filter size (in KB)
_BLOOM_MINMAX_E : enable or disable bloom min max filtering
NABLED

_BLOOM_PREDICAT : enables or disables bloom filter predicate pushdown
E_ENABLED

_BLOOM_PREDICAT : enables or disables bloom filter predicate offload to
E_OFFLOAD cells

_BLOOM_PRUNING_ : Enable partition pruning using bloom filtering
ENABLED

_BLOOM_PUSHING_ : bloom filter pushing size upper bound (in KB)
MAX

_BLOOM_PUSHING_ : bloom filter combined pushing size upper bound (in KB)
TOTAL_MAX

_BLOOM_RM_FILTE : remove bloom predicate in favor of zonemap join pruning
R predicate

_BLOOM_SM_ENABL : enable bloom filter optimization using slave mapping
ED

_BRANCH_TAGGING : enable branch tagging for distributed transaction
_BROADCAST_SCN_ : broadcast-on-commit scn mode
MODE

_BROADCAST_SCN_ : broadcast-on-commit scn wait timeout in centiseconds
WAIT_TIMEOUT

_BSLN_ADAPTIVE_ : Adaptive Thresholds Enabled
THRESHOLDS_ENAB
LED

_BT_MMV_QUERY_R : allow rewrites with multiple MVs and base tables
EWRITE_ENABLED

_BUFFERED_MESSA : Buffered message spill age
GE_SPILL_AGE

_BUFFERED_PUBLI : Flow control threshold for buffered publishers except
SHER_FLOW_CONTR capture
OL_THRESHOLD

_BUFFER_BUSY_WA : buffer busy wait time in centiseconds
IT_TIMEOUT

_BUFQ_STOP_FLOW : Stop enforcing flow control for buffered queues
_CONTROL

_BUILD_DEFERRED : DEFERRED MV creation skipping MV log setup update
_MV_SKIPPING_MV
LOG_UPDATE

_BUMP_HIGHWATER : how many blocks should we allocate per free list on
_MARK_COUNT advancing HWM

_BWR_FOR_FLUSHE : if TRUE, generate a BWR for a flushed PI
D_PI

_BYPASS_SRL_FOR : bypass SRL for S/O EOR logs
_SO_EOR

_BYPASS_XPLATFO : bypass datafile header cross-platform-compliance errors
RM_ERROR

_B_TREE_BITMAP_ : enable the use of bitmap plans for tables w. only
PLANS B-tree indexes

_CACHE_ORL_DURI : cache online logs
NG_OPEN

_CACHE_STATS_MO : if TRUE, enable cache stats monitoring
NITOR

_CAPTURE_BUFFER : To set the size of the PGA I/O recording buffers
_SIZE

_CAPTURE_PUBLIS : Flow control threshold for capture publishers
HER_FLOW_CONTRO
L_THRESHOLD

_CASE_SENSITIVE : case sensitive logon enabled
_LOGON

_CAUSAL_STANDBY : Causal standby wait timeout
_WAIT_TIMEOUT

_CDB_COMPATIBLE : CDB Compatible
_CDB_RAC_AFFINI : rac affinity for parallel cdb operations
TY

_CDC_SUBSCRIPTI : Change Data Capture subscription_owner
ON_OWNER

_CDMP_DIAGNOSTI : cdmp directory diagnostic level
C_LEVEL

_CELL_FAST_FILE : Allow optimized file creation path for Cells
_CREATE

_CELL_FAST_FILE : Allow optimized rman restore for Cells
_RESTORE

_CELL_FILE_FORM : Cell file format chunk size in MB
AT_CHUNK_SIZE

_CELL_INDEX_SCA : enable CELL processing of index FFS
N_ENABLED

_CELL_MATERIALI : Force materialization of all offloadable expressions on
ZE_ALL_EXPRESSI the cells
ONS

_CELL_MATERIALI : enable offload of expressions underlying virtual
ZE_VIRTUAL_COLU columns to cells
MNS

_CELL_OBJECT_EX : flashcache object expiration timeout
PIRATION_HOURS

_CELL_OFFLOAD_C : specifies capability table to load
APABILITIES_ENA
BLED

_CELL_OFFLOAD_C : enable complex SQL processing offload to cells
OMPLEX_PROCESSI
NG

_CELL_OFFLOAD_E : enable offload of expressions to cells
XPRESSIONS

_CELL_OFFLOAD_H : Query offloading of hybrid columnar compressed tables
YBRIDCOLUMNAR to exadata

_CELL_OFFLOAD_P : enable out-of-order SQL processing offload to cells
REDICATE_REORDE
RING_ENABLED

_CELL_OFFLOAD_S : enable offload of SYS_CONTEXT evaluation to cells
YS_CONTEXT

_CELL_OFFLOAD_T : enable timezone related SQL processing offload to cells
IMEZONE

_CELL_OFFLOAD_V : enable offload of predicates on virtual columns to
IRTUAL_COLUMNS cells

_CELL_RANGE_SCA : enable CELL processing of index range scans
N_ENABLED

_CELL_STORIDX_M : Cell Storage Index mode
ODE

_CGS_ALLGROUP_P : CGS DBALL group polling interval in milli-seconds
OLL_TIME

_CGS_COMM_READI : CGS communication readiness check
NESS_CHECK

_CGS_DBALL_GROU : CGS DBALL group registration type
P_REGISTRATION

_CGS_DBGROUP_PO : CGS DB group polling interval in milli-seconds
LL_TIME

_CGS_HEALTH_CHE : CGS health check during reconfiguration
CK_IN_RECONFIG

_CGS_MEMBERKILL : allow a RIM instance to issue a CSS member kill
_FROM_RIM_INSTA
NCE

_CGS_MSG_BATCHI : CGS message batching
NG

_CGS_MSG_BATCH_ : CGS message batch size in bytes
SIZE

_CGS_NODE_KILL_ : CGS node kill escalation to CSS
ESCALATION

_CGS_NODE_KILL_ : CGS wait time to escalate node kill to CSS in seconds
ESCALATION_WAIT

_CGS_RECONFIG_E : CGS reconfiguration extra wait time for CSS in seconds
XTRA_WAIT

_CGS_RECONFIG_T : CGS reconfiguration timeout interval
IMEOUT

_CGS_SEND_TIMEO : CGS send timeout value
UT

_CGS_TICKETS : CGS messaging tickets
_CGS_TICKET_SEN : CGS ticket active sendback percentage threshold
DBACK

_CGS_ZOMBIE_MEM : CGS zombie member kill wait time in seconds
BER_KILL_WAIT

_CHANGE_VECTOR_ : Number of change vector buffers for media recovery
BUFFERS

_CHECK_BLOCK_AF : perform block check after checksum if both are turned
TER_CHECKSUM on

_CHECK_BLOCK_NE : check block new invariant for flashback
W_INVARIANT_FOR
_FLASHBACK

_CHECK_COLUMN_L : check column length
ENGTH

_CHECK_PDBID_IN : Enable checking of pluggable database ID in redo
_REDO

_CHECK_TS_THRES : check tablespace thresholds
HOLD

_CLEANOUT_SHRCU : if TRUE, cleanout shrcur buffers
R_BUFFERS

_CLEANUP_ROLLBA : no. of undo entries to apply per transaction cleanup
CK_ENTRIES

_CLEANUP_TIMEOU : timeout value for PMON cleanup
T

_CLEANUP_TIMEOU : flags for PMON cleanup timeout
T_FLAGS

_CLEAR_BUFFER_B : Always zero-out buffer before reuse for security
EFORE_REUSE

_CLIENT_ENABLE_ : enable automatic unregister after a send fails with
AUTO_UNREGISTER timeout

_CLIENT_NTFN_CL : interval after which dead client registration cleanup
EANUP_INTERVAL task repeats

_CLIENT_NTFN_PI : time between pings to unreachable notification clients
NGINTERVAL

_CLIENT_NTFN_PI : number of times to ping unreachable notification
NGRETRIES clients

_CLIENT_NTFN_PI : timeout to connect to unreachable notification clients
NGTIMEOUT

_CLIENT_RESULT_ : bypass the client result cache
CACHE_BYPASS

_CLIENT_TSTZ_ER : Should Client give error for suspect Timestamp with
ROR_CHECK Timezone operations

_CLI_CACHEBKTAL : Percentage of memory to allocate
LOC

_CLONE_ONE_PDB_ : Recover ROOT and only one PDB in clone database
RECOVERY

_CLOSE_CACHED_O : close cursors cached by PL/SQL at each commit
PEN_CURSORS

_CLOSE_DEQ_BY_C : Close Dequeue By Condition Cursors
OND_CURS

_CLOUD_NAME : gsm cloud name
_CLUSTERWIDE_GL : enable/disable clusterwide global transactions
OBAL_TRANSACTIO
NS

_CLUSTER_LIBRAR : cluster library selection
Y

_COLLAPSE_WAIT_ : collapse wait history
HISTORY

_COLLECT_TEMPUN : Collect Statistics v$tempundostat
DO_STATS

_COLLECT_UNDO_S : Collect Statistics v$undostat
TATS

_COLUMN_COMPRES : Column compression ratio
SION_FACTOR

_COLUMN_ELIMINA : turn off predicate-only column elimination
TION_OFF

_COLUMN_TRACKIN : column usage tracking
G_LEVEL

_COMMON_DATA_VI : common objects returned through dictionary views
EW_ENABLED

_COMMON_USER_PR : Enforce restriction on a prefix of a Common
EFIX User/Role/Profile name

_COMPILATION_CA : Size of the compilation call heaps extents
LL_HEAP_EXTENT_
SIZE

_COMPLEX_VIEW_M : enable complex view merging
ERGING

_COMPRESSION_AB : number of recompression above cache for sanity check
OVE_CACHE

_COMPRESSION_AD : Compression advisor
VISOR

_COMPRESSION_CH : percentage of chained rows allowed for Compression
AIN

_COMPRESSION_CO : Compression compatability
MPATIBILITY

_CONCURRENCY_CH : what is the chosen value of concurrency
OSEN

_CONNECTION_BRO : connection broker host for listen address
KER_HOST

_CONNECT_BY_USE : use union all for connect by
_UNION_ALL

_CONTROLFILE_AU : time delay (in seconds) for performing controlfile
TOBACKUP_DELAY autobackups

_CONTROLFILE_BA : enable check of the copied blocks during controlfile
CKUP_COPY_CHECK backup copy

_CONTROLFILE_BL : control file block size in bytes
OCK_SIZE

_CONTROLFILE_CE : Flash cache hint for control file accesses
LL_FLASH_CACHIN
G

_CONTROLFILE_EN : dump the system states after controlfile enqueue
QUEUE_DUMP timeout

_CONTROLFILE_EN : control file enqueue max holding time in seconds
QUEUE_HOLDING_T
IME

_CONTROLFILE_EN : control file enqueue holding time tracking size
QUEUE_HOLDING_T
IME_TRACKING_SI
ZE

_CONTROLFILE_EN : control file enqueue timeout in seconds
QUEUE_TIMEOUT

_CONTROLFILE_SE : control file initial section size
CTION_INIT_SIZE

_CONTROLFILE_SE : control file max expansion rate
CTION_MAX_EXPAN
D

_CONTROLFILE_UP : controlfile update sanity check
DATE_CHECK

_CONVERT_SET_TO : enables conversion of set operator to join
_JOIN

_COORD_MESSAGE_ : parallel recovery coordinator side extra message buffer
BUFFER size

_CORRUPTED_ROLL : corrupted undo segment list
BACK_SEGMENTS

_COST_EQUALITY_ : enables costing of equality semi-join
SEMI_JOIN

_CPU_EFF_THREAD : CPU effective thread multiplier
_MULTIPLIER

_CPU_TO_IO : divisor for converting CPU cost to I/O cost
_CP_NUM_HASH_LA : connection pool number of hash latches
TCHES

_CRASH_DOMAIN_O : allow domain to exit for exceptions in any thread
N_EXCEPTION

_CREATE_STAT_SE : create ilm statistics segment
GMENT

_CREATE_TABLE_I : allow creation of table in a cluster not owned by the
N_ANY_CLUSTER user

_CR_GRANT_GLOBA : if TRUE, grant lock for CR requests when block is in
L_ROLE global role

_CR_GRANT_LOCAL : turn 3-way CR grants off, make it automatic, or turn it
_ROLE on

_CR_GRANT_ONLY : if TRUE, grant locks when possible and do not send the
block

_CR_SERVER_LOG_ : if TRUE, flush redo log before serving a CR buffer
FLUSH

_CR_TRC_BUF_SIZ : size of cr trace buffer
E

_CTX_DOC_POLICY : enable ctx_doc.policy_stems api
_STEMS

_CURSOR_BIND_CA : maximum size of the cursor bind capture area
PTURE_AREA_SIZE

_CURSOR_BIND_CA : interval (in seconds) between two bind capture for a
PTURE_INTERVAL cursor

_CURSOR_CACHE_T : number of seconds a session cached cursor stay in
IME cache.

_CURSOR_DB_BUFF : additional number of buffers a cursor can pin at once
ERS_PINNED

_CURSOR_FEATURE : Shared cursor features enabled bits.
S_ENABLED

_CURSOR_OBSOLET : Number of cursors per parent before obsoletion.
E_THRESHOLD

_CURSOR_PLAN_EN : enable collection and display of cursor plans
ABLED

_CURSOR_PLAN_HA : version of cursor plan hash value
SH_VERSION

_CURSOR_PLAN_UN : enables/disables using unparse to build
PARSE_ENABLED projection/predicates

_CURSOR_RELOAD_ : Number of failed reloads before marking cursor unusable
FAILURE_THRESHO
LD

_CURSOR_RUNTIME : Shared cursor runtime heap memory limit
HEAP_MEMLIMIT

_CURSOR_STATS_E : Enable cursor stats
NABLED

_CU_ROW_LOCKING : CU row level locking
_CVMAP_BUFFERS : Number of change vector buffers for multi instance
media recovery

_CVW_ENABLE_WEA : enable weak view checking
K_CHECKING

_DATAFILE_COW : Use copy on write snapshot for the renamed file
_DATAFILE_WRITE : datafile write errors crash instance
_ERRORS_CRASH_I
NSTANCE

_DATAPUMP_COMPR : specifies buffer size for BASIC compression algorithm
ESSBAS_BUFFER_S
IZE

_DATAPUMP_METAD : specifies buffer size for metadata file I/O
ATA_BUFFER_SIZE

_DATAPUMP_TABLE : specifies buffer size for table data file I/O
DATA_BUFFER_SIZ
E

_DATA_TRANSFER_ : Percentange * 100 of buffer cache to transfer to data
CACHE_BC_PERC_X transfer cache
100

_DATA_TRANSFER_ : Size of data transfer cache
CACHE_SIZE

_DATA_WAREHOUSI : if TRUE, enable data warehousing scan buffers
NG_SCAN_BUFFERS

_DBFS_MODIFY_IM : DBFS Link allows implicit fetch on modify – only on
PLICIT_FETCH SecureFiles

_DBG_PROC_START : debug process startup
UP

_DBG_SCAN : generic scan debug
_DBMS_SQL_SECUR : Security level in DBMS_SQL
ITY_LEVEL

_DBOP_ENABLED : Any positive number enables automatic DBOP monitoring.
0 is disabled

_DBPOOL_NAME : gsm database pool name
_DBRM_DYNAMIC_T : DBRM dynamic threshold setting
HRESHOLD

_DBRM_NUM_RUNNA : Resource Manager number of runnable list per NUMA node
BLE_LIST

_DBRM_QUANTUM : DBRM quantum
_DBRM_RUNCHK : Resource Manager Diagnostic Running Thread Check
_DBRM_SHORT_WAI : Resource Manager short wait length
T_US

_DBWR_ASYNC_IO : Enable dbwriter asynchronous writes
_DBWR_SCAN_INTE : dbwriter scan interval
RVAL

_DBWR_TRACING : Enable dbwriter tracing
_DB_16K_FLASH_C : flash cache file for 16k block size
ACHE_FILE

_DB_16K_FLASH_C : flash cache size for _db_16k_flash_cache_file
ACHE_SIZE

_DB_2K_FLASH_CA : flash cache file for 2k block size
CHE_FILE

_DB_2K_FLASH_CA : flash cache size for _db_2k_flash_cache_file
CHE_SIZE

_DB_32K_FLASH_C : flash cache file for 32k block size
ACHE_FILE

_DB_32K_FLASH_C : flash cache size for _db_32k_flash_cache_file
ACHE_SIZE

_DB_4K_FLASH_CA : flash cache file for 4k block size
CHE_FILE

_DB_4K_FLASH_CA : flash cache size for _db_4k_flash_cache_file
CHE_SIZE

_DB_8K_FLASH_CA : flash cache file for 8k block size
CHE_FILE

_DB_8K_FLASH_CA : flash cache size for _db_8k_flash_cache_file
CHE_SIZE

_DB_AGING_COOL_ : Touch count set when buffer cooled
COUNT

_DB_AGING_FREEZ : Make CR buffers always be too cold to keep in cache
E_CR

_DB_AGING_HOT_C : Touch count which sends a buffer to head of replacement
RITERIA list

_DB_AGING_STAY_ : Touch count set when buffer moved to head of
COUNT replacement list

_DB_AGING_TOUCH : Touch count which sends a buffer to head of replacement
_TIME list

_DB_ALWAYS_CHEC : Always perform block check and checksum for System
K_SYSTEM_TS tablespace

_DB_BLOCKS_PER_ : Number of blocks per hash latch
HASH_LATCH

_DB_BLOCK_ADJCH : adjacent cache buffer checks – low blkchk overwrite
ECK parameter

_DB_BLOCK_ADJCH : adjacent cache buffer check level
K_LEVEL

_DB_BLOCK_ALIGN : Align Direct Reads
_DIRECT_READ

_DB_BLOCK_BAD_W : enable bad write checks
RITE_CHECK

_DB_BLOCK_BUFFE : Number of database blocks cached in memory: hidden
RS parameter

_DB_BLOCK_CACHE : Always clone data blocks on get (for debugging)
_CLONE

_DB_BLOCK_CACHE : buffer header tracing (non-zero only when debugging)
_HISTORY

_DB_BLOCK_CACHE : buffer header tracing level
_HISTORY_LEVEL

_DB_BLOCK_CACHE : buffer header tracing for lru operations
_HISTORY_LRU

_DB_BLOCK_CACHE : number of unmapped buffers (for tracking swap calls on
_NUM_UMAP blocks)

_DB_BLOCK_CACHE : protect database blocks (true only when debugging)
_PROTECT

_DB_BLOCK_CACHE : protect database blocks (for strictly internal use
_PROTECT_INTERN only)
AL

_DB_BLOCK_CHECK : Check more and dump block before image for debugging
_FOR_DEBUG

_DB_BLOCK_CHECK : check objd and typ on cache disk read
_OBJTYP

_DB_BLOCK_CHUNK : chunkify noncontig multi block reads
IFY_NCMBR

_DB_BLOCK_CORRU : threshold number of block recovery attempts
PTION_RECOVERY_
THRESHOLD

_DB_BLOCK_DO_FU : do full block read even if some blocks are in cache
LL_MBREADS

_DB_BLOCK_HASH_ : Number of database block hash buckets
BUCKETS

_DB_BLOCK_HASH_ : Number of database block hash latches
LATCHES

_DB_BLOCK_HEADE : number of extra buffer headers to use as guard pages
R_GUARD_LEVEL

_DB_BLOCK_HI_PR : Fraction of writes for high priority reasons
IORITY_BATCH_SI
ZE

_DB_BLOCK_KNOWN : Initial Percentage of buffers to maintain known clean
_CLEAN_PCT

_DB_BLOCK_LRU_L : number of lru latches
ATCHES

_DB_BLOCK_MAX_C : Maximum Allowed Number of CR buffers per dba
R_DBA

_DB_BLOCK_MAX_S : Percentage of buffers to inspect when looking for free
CAN_PCT

_DB_BLOCK_MED_P : Fraction of writes for medium priority reasons
RIORITY_BATCH_S
IZE

_DB_BLOCK_NUMA : Number of NUMA nodes
_DB_BLOCK_PREFE : Batched IO enable fast longjumps
TCH_FAST_LONGJU
MPS_ENABLED

_DB_BLOCK_PREFE : Prefetch limit in blocks
TCH_LIMIT

_DB_BLOCK_PREFE : Prefetch force override in blocks
TCH_OVERRIDE

_DB_BLOCK_PREFE : Batched IO enable private cache
TCH_PRIVATE_CAC
HE_ENABLED

_DB_BLOCK_PREFE : Prefetch quota as a percent of cache size
TCH_QUOTA

_DB_BLOCK_PREFE : Batched IO enable skip reading buffers
TCH_SKIP_READIN
G_ENABLED

_DB_BLOCK_PREFE : Allowed wasted percent threshold of prefetched size
TCH_WASTED_THRE
SHOLD_PERC

_DB_BLOCK_TABLE : Size of shared table scan read buffer
_SCAN_BUFFER_SI
ZE

_DB_BLOCK_TEMP_ : generate redo for temp blocks
REDO

_DB_BLOCK_TRACE : trace buffer protect calls
_PROTECT

_DB_BLOCK_VLM_C : check of rvlm mapping leaks (for debugging)
HECK

_DB_BLOCK_VLM_L : Threshold for allowable vlm leaks
EAK_THRESHOLD

_DB_CACHE_ADVIC : cache advisory maximum multiple of current size to
E_MAX_SIZE_FACT similate
OR

_DB_CACHE_ADVIC : cache advisory sampling factor
E_SAMPLE_FACTOR

_DB_CACHE_ADVIC : cache simulation sanity check
E_SANITY_CHECK

_DB_CACHE_BLOCK : dump short call stack for block reads
_READ_STACK_TRA
CE

_DB_CACHE_CRX_C : check for costly crx examination functions
HECK

_DB_CACHE_MISS_ : check LEs after cache miss
CHECK_LES

_DB_CACHE_MMAN_ : check for wait latch get under MMAN ops in kcb
LATCH_CHECK

_DB_CACHE_PRE_W : Buffer Cache Pre-Warm Enabled : hidden parameter
ARM

_DB_CACHE_PROCE : maximum number of cr pins a process may have
SS_CR_PIN_MAX

_DB_CACHE_WAIT_ : trace new kslwaits
DEBUG

_DB_CHANGE_NOTI : enable db change notification
FICATION_ENABLE

_DB_CHECK_CELL_ :
HINTS

_DB_DISABLE_TEM : Disable Temp Encryption for Spills
P_ENCRYPTION

_DB_DUMP_FROM_D : dump contents from disk and efc
ISK_AND_EFC

_DB_DW_SCAN_ADA : if TRUE, enable adaptive DW scan cooling
PTIVE_COOLING

_DB_DW_SCAN_MAX : DW Scan adaptive cooling max shadow count
_SHADOW_COUNT

_DB_DW_SCAN_OBJ : DW Scan object cooling factor to cool all temperatures
_COOLING_FACTOR

_DB_DW_SCAN_OBJ : DW Scan object cooling interval in number of scans,
_COOLING_INTERV seconds, or pct of cache size
AL

_DB_DW_SCAN_OBJ : DW scan objtect cooling policy
_COOLING_POLICY

_DB_DW_SCAN_OBJ : DW Scan object warming increment when an object is
_WARMING_INCREM scanned
ENT

_DB_FAST_OBJ_CH : enable fast object drop sanity check
ECK

_DB_FAST_OBJ_CK : enable fast object checkpoint
PT

_DB_FAST_OBJ_TR : enable fast object truncate
UNCATE

_DB_FILE_DIRECT : Sequential I/O buf size
_IO_COUNT

_DB_FILE_EXEC_R : multiblock read count for regular clients
EAD_COUNT

_DB_FILE_FORMAT : Block formatting I/O buf count
_IO_BUFFERS

_DB_FILE_NONCON : number of noncontiguous db blocks to be prefetched
TIG_MBLOCK_READ
_COUNT

_DB_FILE_OPTIMI : multiblock read count for regular clients
ZER_READ_COUNT

_DB_FLASHBACK_I : Flashback IO Buffer Size
OBUF_SIZE

_DB_FLASHBACK_L : Minimum flashback database log size in bytes
OG_MIN_SIZE

_DB_FLASHBACK_L : Minimum flashback database log total space in bytes
OG_MIN_TOTAL_SP
ACE

_DB_FLASHBACK_N : Flashback Number of IO buffers
UM_IOBUF

_DB_FLASH_CACHE : Flash cache force replenish lower limit in buffers
_FORCE_REPLENIS
H_LIMIT

_DB_FLASH_CACHE : Flash cache keep buffer upper limit in percentage
_KEEP_LIMIT

_DB_FLASH_CACHE : Flash cache maximum latency allowed in 10 milliseconds
_MAX_LATENCY

_DB_FLASH_CACHE : Flash cache maximum outstanding writes allowed
_MAX_OUTSTANDIN
G_WRITES

_DB_FLASH_CACHE : Flash cache max read retry
_MAX_READ_RETRY

_DB_FLASH_CACHE : Flash cache maximum slow io allowed
_MAX_SLOW_IO

_DB_FLASH_CACHE : Flash cache write buffer upper limit in percentage
_WRITE_LIMIT

_DB_HANDLES : System-wide simultaneous buffer operations
_DB_HANDLES_CAC : Buffer handles cached each process
HED

_DB_HOT_BLOCK_T : track hot blocks for hash latch contention
RACKING

_DB_INDEX_BLOCK : index block checking override parameter
_CHECKING

_DB_INITIAL_CAC : size of cache created at startup
HESIZE_CREATE_M
B

_DB_L2_TRACING : flash cache debug tracing
_DB_LARGE_DIRTY : Number of buffers which force dirty queue to be written
_QUEUE

_DB_LOST_WRITE_ : Enable scn based lost write detection mechanism
CHECKING

_DB_LOST_WRITE_ : Enable _db_lost_write_checking tracing
TRACING

_DB_MTTR_ADVICE : MTTR advisory
_DB_MTTR_PARTIT : number of partitions for MTTR advisory
IONS

_DB_MTTR_SAMPLE : MTTR simulation sampling factor
_FACTOR

_DB_MTTR_SIM_TA : MTTR simulation targets
RGET

_DB_MTTR_SIM_TR : MTTR simulation trace size
ACE_SIZE

_DB_MTTR_TRACE_ : dump trace entries to alert file
TO_ALERT

_DB_NOARCH_DISB : Image redo logging (NOARCHIVEMODE)
LE_OPTIM

_DB_NUM_EVICT_W : number of evict wait events
AITEVENTS

_DB_NUM_GSM : database number in gsm dbpool
_DB_OBJ_ENABLE_ : enable ksr in object checkpoint/reuse
KSR

_DB_PERCENT_HOT : Percent of default buffer pool considered hot
_DEFAULT

_DB_PERCENT_HOT : Percent of keep buffer pool considered hot
_KEEP

_DB_PERCENT_HOT : Percent of recycle buffer pool considered hot
_RECYCLE

_DB_PERCPU_CREA : size of cache created per cpu in deferred cache create
TE_CACHESIZE

_DB_PREFETCH_HI : maintain prefetch histogram statistics in x$kcbprfhs
STOGRAM_STATIST
ICS

_DB_RECOVERY_TE : default database recovery temporal file location
MPORAL_FILE_DES
T

_DB_REQUIRED_PE : percent of fairshare a processor group should always
RCENT_FAIRSHARE use
_USAGE

_DB_ROW_OVERLAP : row overlap checking override parameter for data/index
_CHECKING blocks

_DB_TODEFER_CAC : buffer cache deferred create
HE_CREATE

_DB_WRITER_CHUN : Number of writes DBWR should wait for
K_WRITES

_DB_WRITER_COAL : Size of memory allocated to dbwriter for coalescing
ESCE_AREA_SIZE writes

_DB_WRITER_COAL : Limit on size of coalesced write
ESCE_WRITE_LIMI
T

_DB_WRITER_FLUS : If FALSE, DBWR will not downgrade IMU txns for AGING
H_IMU

_DB_WRITER_HIST : maintain dbwr histogram statistics in x$kcbbhs
OGRAM_STATISTIC
S

_DB_WRITER_MAX_ : Max number of outstanding DB Writer IOs
WRITES

_DB_WRITER_NOME : Enable DBWR no-memcopy coalescing
MCOPY_COALESCE

_DB_WRITER_VERI : Enable lost write detection mechanism
FY_WRITES

_DDE_FLOOD_CONT : Initialize Flood Control at database open
ROL_INIT

_DD_VALIDATE_RE : GES deadlock detection validate remote locks
MOTE_LOCKS

_DEADLOCK_DIAGN : automatic deadlock resolution diagnostics level
OSTIC_LEVEL

_DEADLOCK_RECOR : record resolved deadlocks to the alert log
D_TO_ALERT_LOG

_DEADLOCK_RESOL : create incidents when resolving any deadlock?
UTION_INCIDENTS
_ALWAYS

_DEADLOCK_RESOL : create incidents during deadlock resolution
UTION_INCIDENTS
_ENABLED

_DEADLOCK_RESOL : automatic deadlock resolution level
UTION_LEVEL

_DEADLOCK_RESOL : the minimum wait timeout required for deadlock
UTION_MIN_WAIT_ resolution
TIMEOUT_SECS

_DEADLOCK_RESOL : the amount of time given to process a deadlock
UTION_SIGNAL_PR resolution signal
OCESS_THRESH_SE
CS

_DEAD_PROCESS_S : PMON dead process scan interval (in seconds)
CAN_INTERVAL

_DEDICATED_SERV : dedicated server poll count
ER_POLL_COUNT

_DEDICATED_SERV : dedicated server post/wait
ER_POST_WAIT

_DEDICATED_SERV : dedicated server post/wait call
ER_POST_WAIT_CA
LL

_DEFAULT_ENCRYP : default encryption algorithm
T_ALG

_DEFAULT_NON_EQ : sanity check on default selectivity for like/range
UALITY_SEL_CHEC predicate
K

_DEFERRED_CONST : Deferred constant folding mode
ANT_FOLDING_MOD
E

_DEFERRED_LOG_D : consider deferred log dest as valid for log deletion
EST_IS_VALID (TRUE/FALSE)

_DEFERRED_SEG_I : Enable Deferred Segment Creation in Seed
N_SEED

_DEFER_EOR_ORL_ : defer EOR ORL archival for switchover
ARCH_FOR_SO

_DEFER_LOG_BOUN : defer media recovery checkpoint at log boundary
DARY_CKPT

_DEFER_LOG_COUN : Number of log boundaries media recovery checkpoint lags
T behind

_DEFER_RCV_DURI : Defer recovery during switchover to standby
NG_SW_TO_SBY

_DEFER_SGA_ALLO : Chunk size for defer sga allocation
C_CHUNK_SIZE

_DEFER_SGA_ENAB : Enable deferred shared memory allocation for SGA
LED

_DEFER_SGA_MIN_ : Minimum shared pool size at startup with deferred sga
SPSZ_AT_STARTUP enabled

_DEFER_SGA_MIN_ : Minimum total deferred segs size for defer sga
TOTAL_DEFER_SEG allocation
S_SZ

_DEFER_SGA_TEST : SA** sleeps for N secs before allocating a deferred
_ALLOC_INTV segment

_DELAY_INDEX_MA : delays index maintenance until after MV is refreshed
INTAIN

_DELTA_PUSH_SHA : enable delta push if greater than the # of share
RE_BLOCKERS blockers

_DEQ_EXECUTE_RE : deq execute reset time
SET_TIME

_DEQ_HT_CHILD_L : deq ht child latches
ATCHES

_DEQ_HT_MAX_ELE : deq ht max elements
MENTS

_DEQ_LARGE_TXN_ : deq large txn size
SIZE

_DEQ_LOG_ARRAY_ : deq log array size
SIZE

_DEQ_MAXWAIT_TI : Change wait times between dequeue calls
ME

_DEQ_MAX_FETCH_ : deq max fetch count
COUNT

_DESIRED_README : The desired percentage of redo reading from memory
M_RATE

_DG_BROKER_TRAC : data guard broker trace level
E_LEVEL

_DG_CF_CHECK_TI : Data Guard controlfile check timer
MER

_DG_CORRUPT_RED : Corrupt redo log validation during archivals
O_LOG

_DIAG_ADR_AUTO_ : Enable/disable ADR MMON Auto Purging
PURGE

_DIAG_ADR_ENABL : Parameter to enable/disable Diag ADR
ED

_DIAG_ADR_TEST_ : Test parameter for Diagnosability
PARAM

_DIAG_ARB_BEFOR : dump diagnostics before killing unresponsive ARBs
E_KILL

_DIAG_BACKWARD_ : Backward Compatibility for Diagnosability
COMPAT

_DIAG_CC_ENABLE : Parameter to enable/disable Diag Call Context
D

_DIAG_CONF_CAP_ : Parameter to enable/disable Diag Configuration Capture
ENABLED

_DIAG_CRASHDUMP : parameter for systemstate dump level, used by DIAG
_LEVEL during crash

_DIAG_DAEMON : start DIAG daemon
_DIAG_DDE_ASYNC : diag dde async actions: message age limit (in seconds)
_AGE_LIMIT

_DIAG_DDE_ASYNC : diag dde async actions: action cputime limit (in
_CPUTIME_LIMIT seconds)

_DIAG_DDE_ASYNC : diag dde async actions: dispatch mode
_MODE

_DIAG_DDE_ASYNC : diag dde async actions: number of preallocated message
_MSGS buffers

_DIAG_DDE_ASYNC : diag dde async actions: message buffer capacity
_MSG_CAPACITY

_DIAG_DDE_ASYNC : diag dde async actions: message processing rate – per
_PROCESS_RATE loop

_DIAG_DDE_ASYNC : diag dde async actions: action runtime limit (in
_RUNTIME_LIMIT seconds)

_DIAG_DDE_ASYNC : diag dde async actions: max number of concurrent slave
_SLAVES processes

_DIAG_DDE_ENABL : enable DDE handling of critical errors
ED

_DIAG_DDE_FC_EN : Parameter to enable/disable Diag Flood Control
ABLED

_DIAG_DDE_FC_IM : Override Implicit Error Flood Control time parameter
PLICIT_TIME

_DIAG_DDE_FC_MA : Override Macro Error Flood Control time parameter
CRO_TIME

_DIAG_DDE_INC_P : The minimum delay between two MMON incident sweeps
ROC_DELAY (minutes)

_DIAG_DIAGNOSTI : Turn off diag diagnostics
CS

_DIAG_DUMP_REQU : DIAG dump request debug level (0-2)
EST_DEBUG_LEVEL

_DIAG_DUMP_TIME : timeout parameter for SYNC dump
OUT

_DIAG_ENABLE_ST : enable events in instance startup notifiers
ARTUP_EVENTS

_DIAG_HM_RC_ENA : Parameter to enable/disable Diag HM Reactive Checks
BLED

_DIAG_HM_TC_ENA : Parameter to enable/disable Diag HM Test(dummy) Checks
BLED

_DIAG_PROC_ENAB : enable hung process diagnostic API
LED

_DIAG_PROC_MAX_ : hung process diagnostic API max wait time in
TIME_MS milliseconds

_DIAG_PROC_STAC : hung process diagnostic API stack capture type
K_CAPTURE_TYPE

_DIAG_TEST_SEG_ : Sets trace segmentation to be in reincarnation mode
REINC_MODE

_DIAG_UTS_CONTR : UTS control parameter
OL

_DIAG_VERBOSE_E : Allow verbose error tracing on diag init
RROR_ON_INIT

_DIAG_XM_ENABLE : If TRUE, DIAG allows message exchanges across DB/ASM
D boundary

_DIMENSION_SKIP : control dimension skip when null feature
_NULL

_DIRECT_IO_SKIP : Skip current slot on error
_CUR_SLOT_ON_ER
ROR

_DIRECT_IO_SLOT : number of slots for direct path I/O
S

_DIRECT_IO_WSLO : number of write slots for direct path I/O
TS

_DIRECT_PATH_IN : disable direct path insert features
SERT_FEATURES

_DIRECT_READ_DE : enable direct read decision based on optimizer
CISION_STATISTI statistics
CS_DRIVEN

_DISABLE_12751 : disable policy timeout error (ORA-12751)
_DISABLE_12CBIG : DIsable Storing ILM Statistics in 12cBigFiles
FILE

_DISABLE_ACTIVE : disable active influx move during parallel media
_INFLUX_MOVE recovery

_DISABLE_ADAPTI : adaptive shrunk aggregation
VE_SHRUNK_AGGRE
GATION

_DISABLE_APPLIA : Disable appliance-specific code
NCE_CHECK

_DISABLE_APPLIA : Disable appliance partnering algorithms
NCE_PARTNERING

_DISABLE_AUTOTU : disable autotune global transaction background
NE_GTX processes

_DISABLE_BLOCK_ : disable block checking at the session level
CHECKING

_DISABLE_CELL_O : disable cell optimized backups
PTIMIZED_BACKUP
S

_DISABLE_CPU_CH : disable cpu_count check
ECK

_DISABLE_CURSOR : disable cursor sharing
_SHARING

_DISABLE_DATALA : disable datalayer sampling
YER_SAMPLING

_DISABLE_DIRECT : Disable directory link checking
ORY_LINK_CHECK

_DISABLE_DUPLEX : Turn off connection duplexing
_LINK

_DISABLE_FASTOP : Do Not Use Fastopen
EN

_DISABLE_FAST_A : fast aggregation
GGREGATION

_DISABLE_FAST_V : disable PL/SQL fast validation
ALIDATE

_DISABLE_FBA_QR : disable flashback archiver query rewrite
W

_DISABLE_FBA_WP : disable flashback archiver wait for prepared
R transactions

_DISABLE_FILE_L : disable file locks for control, data, redo log files
OCKS

_DISABLE_FLASHB : disable flashback archiver
ACK_ARCHIVER

_DISABLE_FLASHB : Don’t use the Flashback Recyclebin optimization
ACK_RECYCLEBIN_
OPT

_DISABLE_FLASHB : Disable flashback wait callback
ACK_WAIT_CALLBA
CK

_DISABLE_FUNCTI : disable function-based index matching
ON_BASED_INDEX

_DISABLE_GVAQ_C : Disable cache
ACHE

_DISABLE_HEALTH : Disable Health Check
_CHECK

_DISABLE_HIGHRE : disable high-res tick counter
S_TICKS

_DISABLE_IMAGE_ : Disable Oracle executable image checking
CHECK

_DISABLE_IMPLIC : disable implicit row movement
IT_ROW_MOVEMENT

_DISABLE_INCREM : Disable incremental checkpoints for thread recovery
ENTAL_CHECKPOIN
TS

_DISABLE_INCREM : Disable incremental recovery checkpoint mechanism
ENTAL_RECOVERY_
CKPT

_DISABLE_INDEX_ : disable index block prefetching
BLOCK_PREFETCHI
NG

_DISABLE_INITIA : disable initial block compression
L_BLOCK_COMPRES
SION

_DISABLE_INSTAN : disable instance type check for ksp
CE_PARAMS_CHECK

_DISABLE_INTERF : disable interface checking at startup
ACE_CHECKING

_DISABLE_KCBHXO : disable kcbh(c)xor OSD functionality
R_OSD

_DISABLE_KCBL_F : Disable KCBL flashback block new optimization
LASHBACK_BLOCKN
EW_OPT

_DISABLE_KCB_FL : Disable KCB flashback block new optimization
ASHBACK_BLOCKNE
W_OPT

_DISABLE_KGGHSH : disable kgghshcrc32chk OSD functionality
CRC32_OSD

_DISABLE_LATCH_ : disable latch-free SCN writes using 32-bit compare &
FREE_SCN_WRITES swap
_VIA_32CAS

_DISABLE_LATCH_ : disable latch-free SCN writes using 64-bit compare &
FREE_SCN_WRITES swap
_VIA_64CAS

_DISABLE_LOGGIN : Disable logging
G

_DISABLE_METRIC : Disable Metrics Group (or all Metrics Groups)
S_GROUP

_DISABLE_MULTIP : disable multiple block size support (for debugging)
LE_BLOCK_SIZES

_DISABLE_ODM : disable odm feature
_DISABLE_PARALL : Disable parallel conventional loads
EL_CONVENTIONAL
_LOAD

_DISABLE_PRIMAR : disable primary bitmap switch
Y_BITMAP_SWITCH

_DISABLE_READ_O : Disable read-only open dictionary check
NLY_OPEN_DICT_C
HECK

_DISABLE_REBALA : disable space usage checks for storage reconfiguration
NCE_SPACE_CHECK

_DISABLE_RECOVE : Disable the read optimization during media recovery
RY_READ_SKIP

_DISABLE_ROLLIN : Disable Rolling Patch Feature
G_PATCH

_DISABLE_SAMPLE : disable row sampling IO optimization
_IO_OPTIM

_DISABLE_SAVEPO : disable the fix for bug 1402161
INT_RESET

_DISABLE_SELFTU : Disable self-tune checkpointing
NE_CHECKPOINTIN
G

_DISABLE_STORAG : Disable storage type checks
E_TYPE

_DISABLE_STREAM : streams diagnostics
S_DIAGNOSTICS

_DISABLE_STREAM : disable streams pool auto tuning
S_POOL_AUTO_TUN
ING

_DISABLE_SUN_RS : Disable IPC OSD support for Sun RSMAPI
M

_DISABLE_SYSTEM : disable system state dump
_STATE

_DISABLE_SYSTEM : Disable system state dump – wait samples
_STATE_WAIT_SAM
PLES

_DISABLE_TEMP_T : disable tablespace alerts for TEMPORARY tablespaces
ABLESPACE_ALERT
S

_DISABLE_THREAD : Disable thread internal disable feature
_INTERNAL_DISAB
LE

_DISABLE_THREAD : Thread snapshot
_SNAPSHOT

_DISABLE_TXN_AL : disable txn layer alert
ERT

_DISABLE_UNDO_T : disable tablespace alerts for UNDO tablespaces
ABLESPACE_ALERT
S

_DISABLE_WAIT_S : Disable wait state
TATE

_DISCRETE_TRANS : enable OLTP mode
ACTIONS_ENABLED

_DISKMON_PIPE_N : DiSKMon skgznp pipe name
AME

_DISK_SECTOR_SI : if TRUE, OSD sector size could be overridden
ZE_OVERRIDE

_DISPATCHER_RAT : scale to display rate statistic (100ths of a second)
E_SCALE

_DISPATCHER_RAT : time-to-live for rate statistic (100ths of a second)
E_TTL

_DISTINCT_VIEW_ : enables unnesting of in subquery into distinct view
UNNESTING

_DISTRIBUTED_RE : number of seconds RECO holds outbound connections open
COVERY_CONNECTI
ON_HOLD_TIME

_DLMTRACE : Trace string of global enqueue type(s)
_DML_BATCH_ERRO : number or error handles allocated for DML in batch mode
R_LIMIT

_DML_FREQUENCY_ : Control DML frequency tracking
TRACKING

_DML_FREQUENCY_ : Control automatic advance and broadcast of DML
TRACKING_ADVANC frequencies
E

_DML_FREQUENCY_ : Number of slots to use for DML frequency tracking
TRACKING_SLOTS

_DML_FREQUENCY_ : Time length of each slot for DML frequency tracking
TRACKING_SLOT_T
IME

_DML_MONITORING : enable modification monitoring
_ENABLED

_DM_DMF_DETAILS : set dm dmf details compatibility version
_COMPATIBILITY

_DM_ENABLE_LEGA : revert dmf output types to pre-12.1.0.1
CY_DMF_OUTPUT_T
YPES

_DM_MAX_SHARED_ : max percentage of the shared pool to use for a mining
POOL_PCT model

_DNFS_RDMA_ENAB : Enable dNFS RDMA transfers
LE

_DNFS_RDMA_MAX   : Maximum size of dNFS RDMA transfer
_DNFS_RDMA_MIN   : Minimum size of dNFS RDMA transfer
_DOMAIN_INDEX_B : maximum number of rows from one call to domain index
ATCH_SIZE           fetch routine

_DOMAIN_INDEX_D : maximum number of rows for one call to domain index dml
ML_BATCH_SIZE routines

_DRA_BMR_NUMBER : Maximum number of BMRs that can be done to a file
_THRESHOLD

_DRA_BMR_PERCEN : Maximum percentage of blocks in a file that can be
T_THRESHOLD BMR-ed

_DRA_ENABLE_OFF : Enable the periodic creation of the offline dictionary
LINE_DICTIONARY for DRA

_DRM_PARALLEL_F : if TRUE enables parallel drm freeze
REEZE

_DROP_FLASHBACK : Drop logical operations enqueue immediately during
_LOGICAL_OPERAT flashback marker generation
IONS_ENQ

_DROP_STAT_SEGM : drop ilm statistics segment
ENT

_DROP_TABLE_GRA : drop_table_granule
NULE

_DROP_TABLE_OPT : reduce SGA memory use during drop of a partitioned
IMIZATION_ENABL table
ED

_DSC_FEATURE_LE : controls the feature level for deferred segment
VEL creation

_DSKM_HEALTH_CH : DiSKMon health check counter
ECK_CNT

_DSS_CACHE_FLUS : enable full cache flush for parallel execution
H

_DS_ENABLE_AUTO : Dynamic Sampling Service Autonomous Transaction control
_TXN parameter

_DS_IOCOUNT_IOS : Dynamic Sampling Service defaults: #IOs and IO Size
IZE

_DS_PARSE_MODEL : Dynamic Sampling Service Parse Model control parameter
_DTREE_AREA_SIZ : size of Decision Tree Classification work area
E

_DTREE_BINNING_ : Decision Tree Binning Enabled
ENABLED

_DTREE_BINTEST_ : Decision Tree Binning Test ID
ID

_DTREE_COMPRESS : Decision Tree Using Compressed Bitmaps Enabled
BMP_ENABLED

_DTREE_MAX_SURR : maximum number of surrogates
OGATES

_DTREE_PRUNING_ : Decision Tree Pruning Enabled
ENABLED

_DUMMY_INSTANCE : dummy instance started by RMAN
_DUMP_10261_LEV : Dump level for event 10261, 1=>minimal dump 2=>top pga
EL dump

_DUMP_COMMON_SU : dump common subexpressions
BEXPRESSIONS

_DUMP_CONNECT_B : dump connect by loop error message into trc file
Y_LOOP_DATA

_DUMP_CURSOR_HE : dump comp/exec heap sizes to tryace file
AP_SIZES

_DUMP_INTERVAL_ : trace dump time interval limit (in seconds)
LIMIT

_DUMP_MAX_LIMIT : max number of dump within dump interval
_DUMP_QBC_TREE : dump top level query parse tree to trace
_DUMP_RCVR_IPC : if TRUE enables IPC dump at instance eviction time
_DUMP_SCN_INCRE : Dumps scn increment stack per session
MENT_STACK

_DUMP_SYSTEM_ST : scope of sysstate dump during instance termination
ATE_SCOPE

_DUMP_TRACE_SCO : scope of trace dump during a process crash
PE

_DYNAMIC_RLS_PO : rls policies are dynamic
LICIES

_DYNAMIC_STATS_ : delay threshold (in seconds) between sending statistics
THRESHOLD messages

_EIGHTEENTH_SPA : eighteenth spare parameter – string
RE_PARAMETER

_EIGHTH_SPARE_P : eighth spare parameter – integer
ARAMETER

_ELEVENTH_SPARE : eleventh spare parameter – integer
_PARAMETER

_ELIMINATE_COMM : enables elimination of common sub-expressions
ON_SUBEXPR

_EMON_MAX_ACTIV : maximum open connections to clients per emon
E_CONNECTIONS

_EMON_OUTBOUND_ : timeout for completing connection set up to clients
CONNECT_TIMEOUT

_EMON_POOL_INC   : increment in EMON slaves per pool type
_EMON_POOL_MAX   : maximum number of EMON slaves per pool type
_EMON_POOL_MIN   : minimum number of EMON slaves per pool type
_EMON_REGULAR_N : number of EMON slaves doing regular database
TFN_SLAVES          notifications

_EMON_SEND_TIME : send timeout after which the client is unregistered
OUT

_EMX_CONTROL : EM Express control (internal use only)
_EMX_MAX_SESSIO : Maximum number of sessions in the EM Express cache
NS

_EMX_SESSION_TI : Session timeout (sec) in the EM Express cache
MEOUT

_ENABLE_12G_BFT : enable 12g bigfile tablespace
_ENABLE_ASYNCVI : enable asynch vectored I/O
O

_ENABLE_AUTOMAT : if 1, Automated Maintenance Is Enabled
IC_MAINTENANCE

_ENABLE_AUTOMAT : Automatic SQL Tuning Advisory enabled parameter
IC_SQLTUNE

_ENABLE_BLOCK_L : enable block level recovery
EVEL_TRANSACTIO
N_RECOVERY

_ENABLE_CHECK_T : enable checking of corruption caused by canceled
RUNCATE truncate

_ENABLE_COLUMNA : Enable Columnar Flash Cache Rewrite
R_CACHE

_ENABLE_CSCN_CA : enable commit SCN caching for all transactions
CHING

_ENABLE_DDL_WAI : use this to turn off ddls with wait semantics
T_LOCK

_ENABLE_DEFAULT : enable default implementation of hard affinity osds
_AFFINITY

_ENABLE_DEFAULT : Enable Default Tablespace Utilization Threshold for
_TEMP_THRESHOLD UNDO Tablespaces

_ENABLE_DEFAULT : Enable Default Tablespace Utilization Threshold for
_UNDO_THRESHOLD TEMPORARY Tablespaces

_ENABLE_DML_LOC : enable dml lock escalation against partitioned tables
K_ESCALATION if TRUE

_ENABLE_EDITION : enable editions for all users
S_FOR_USERS

_ENABLE_EXCHANG : use check constraints on the table for validation
E_VALIDATION_US
ING_CHECK

_ENABLE_FAST_RE : enable fast refresh after move tablespace
F_AFTER_MV_TBS

_ENABLE_FFW : FAL FORWARDING
_ENABLE_FLASH_L : Enable Exadata Smart Flash Logging
OGGING

_ENABLE_FRONT_E : enable front end view optimization
ND_VIEW_OPTIMIZ
ATION

_ENABLE_HASH_OV : TRUE – enable hash cluster overflow based on SIZE
ERFLOW

_ENABLE_HEATMAP : heatmap related – to be used by oracle dev only
_INTERNAL

_ENABLE_HWM_SYN : enable HWM synchronization
C

_ENABLE_IEE_STA : enables IEE stats gathering
TS

_ENABLE_ILM_FLU : Enable ILM Stats Flush
SH_STATS

_ENABLE_ILM_TES : Enable Test ILM Stats Flush
TFLUSH_STATS

_ENABLE_KQF_PUR : Enable KQF fixed runtime table purge
GE

_ENABLE_LGPG_DE : Enable LGPG debug mode
BUG

_ENABLE_LIST_IO : Enable List I/O
_ENABLE_MIDTIER : enable midtier affinity metrics processing
_AFFINITY

_ENABLE_MINSCN_ : enable/disable minscn optimization for CR
CR

_ENABLE_NATIVEN : Enable skgxp driver usage for native net
ET_TCPIP

_ENABLE_NUMA_IN : Enable NUMA interleave mode
TERLEAVE

_ENABLE_NUMA_OP : Enable NUMA specific optimizations
TIMIZATION

_ENABLE_NUMA_SU : Enable NUMA support and optimizations
PPORT

_ENABLE_OBJ_QUE : enable object queues
UES

_ENABLE_OFFLOAD : Enable offloaded writes for Unit Test
ED_WRITES

_ENABLE_ONLINE_ : Allow online index creation algorithm without S DML
INDEX_WITHOUT_S lock
_LOCKING

_ENABLE_PLUGGAB : Enable Pluggable Database
LE_DATABASE

_ENABLE_QUERY_R : mv rewrite on remote table/view
EWRITE_ON_REMOT
E_OBJS

_ENABLE_REDO_GL : LGWR post globally on write
OBAL_POST

_ENABLE_REFRESH : enable or disable MV refresh scheduling (revert to 9.2
_SCHEDULE behavior)

_ENABLE_RELIABL : Enable reliable latch waits
E_LATCH_WAITS

_ENABLE_RENAME_ : enable RENAME-clause using ALTER USER statement
USER

_ENABLE_RLB : enable RLB metrics processing
_ENABLE_ROW_SHI : use the row shipping optimization for wide table
PPING selects

_ENABLE_SB_DETE : Split Brain Detection
CTION

_ENABLE_SCHEMA_ : enable DDL operations (e.g. creation) involving schema
SYNONYMS synonyms

_ENABLE_SCN_WAI : use this to turn off scn wait interface in kta
T_INTERFACE

_ENABLE_SECUREF : Enable securefile flashback optimization
ILE_FLASHBACK_O
PT

_ENABLE_SEPARAB : enable/disable separable transactions
LE_TRANSACTIONS

_ENABLE_SHARED_ : temporary to disable/enable kgh policy
POOL_DURATIONS

_ENABLE_SHARED_ : Enable shared server vector I/O
SERVER_VECTOR_I
O

_ENABLE_SPACEBG : enable space management background task
_ENABLE_SPACE_P : enable space pre-allocation
REALLOCATION

_ENABLE_TABLESP : enable tablespace alerts
ACE_ALERTS

_ENABLE_TYPE_DE : enable type dependent selectivity estimates
P_SELECTIVITY

_ENDPROT_CHUNK_ : chunk comment for selective overrun protection
COMMENT

_ENDPROT_HEAP_C : heap comment for selective overrun protection
OMMENT

_ENDPROT_SUBHEA : selective overrun protection for subeheaps
PS

_ENQUEUE_DEADLO : enable deadlock detection on all global enqueues
CK_DETECT_ALL_G
LOBAL_LOCKS

_ENQUEUE_DEADLO : deadlock scan interval
CK_SCAN_SECS

_ENQUEUE_DEADLO : requests with timeout <= this will not have deadlock
CK_TIME_SEC detection

_ENQUEUE_DEBUG_ : debug enqueue multi instance
MULTI_INSTANCE

_ENQUEUE_HASH : enqueue hash table length
_ENQUEUE_HASH_C : enqueue hash chain latches
HAIN_LATCHES

_ENQUEUE_LOCKS : locks for managed enqueues
_ENQUEUE_PARANO : enable enqueue layer advanced debugging checks
IA_MODE_ENABLED

_ENQUEUE_RESOUR : resources for enqueues
CES

_ENQUEUE_SYNC_R : max number of times the bg process to retry synchronous
ETRY_ATTEMPTS enqueue open if it failed because master could not
allocate memory

_ENQUEUE_SYNC_S : simulate master instance running out of memory when
IM_MEM_ERROR synchronously getting a remotely mastered enqueue

_EVOLVE_PLAN_BA : Level of detail to show in plan verification/evolution
SELINE_REPORT_L report
EVEL

_EVT_SYSTEM_EVE : disable system event propagation
NT_PROPAGATION

_EXPAND_AGGREGA : expand aggregates
TES

_EXPLAIN_REWRIT : allow additional messages to be generated during
E_MODE explain rewrite

_EXTENDED_PRUNI : do runtime pruning in iterator if set to TRUE
NG_ENABLED

_EXTERNAL_SCN_L : High delta SCN threshold in seconds
OGGING_THRESHOL
D_SECONDS

_EXTERNAL_SCN_R : external SCN rejection delta threshold in minutes
EJECTION_DELTA_
THRESHOLD_MINUT
ES

_EXTERNAL_SCN_R : Lag in hours between max allowed SCN and an external
EJECTION_THRESH SCN
OLD_HOURS

_FAIRNESS_THRES : number of times to CR serve before downgrading lock
HOLD

_FAIR_REMOTE_CV : if TRUE enables fair remote convert
T

_FASTPIN_ENABLE : enable reference count based fast pins
_FAST_CURSOR_RE : use more memory in order to get faster execution
EXECUTE

_FAST_DUAL_ENAB : enable/disable fast dual
LED

_FAST_FULL_SCAN : enable/disable index fast full scan
_ENABLED

_FAST_INDEX_MAI : fast global index maintenance during PMOPs
NTENANCE

_FAST_PSBY_CONV : Enable fast physical standby conversion
ERSION

_FBDA_BUSY_PERC : flashback archiver busy percentage
ENTAGE

_FBDA_DEBUG_ASS : flashback archiver debug assert for testing
ERT

_FBDA_DEBUG_MOD : flashback archiver debug event for testing
E

_FBDA_GLOBAL_BS : flashback archiver global barrier scn lag
CN_LAG

_FBDA_INLINE_PE : flashback archiver inline percentage
RCENTAGE

_FBDA_RAC_INACT : flashback archiver rac inactive limit
IVE_LIMIT

_FG_IORM_SLAVES : ForeGround I/O slaves for IORM
_FG_LOG_CHECKSU : Checksum redo in foreground process
M

_FG_SYNC_SLEEP_ : Log file sync via usleep
USECS

_FIC_ALGORITHM_ : Set Frequent Itemset Counting Algorithm
SET

_FIC_AREA_SIZE : size of Frequent Itemset Counting work area
_FIC_MAX_LENGTH : Frequent Itemset Counting Maximum Itemset Length
_FIC_MIN_BMSIZE : Frequent Itemset Counting Minimum BITMAP Size
_FIC_OUTOFMEM_C : Frequent Itemset Counting Out Of Memory Candidates
ANDIDATES Generation

_FIFTEENTH_SPAR : fifteenth spare parameter – integer
E_PARAMETER

_FIFTH_SPARE_PA : fifth spare parameter – integer
RAMETER

_FILEMAP_DIR : FILEMAP directory
_FILE_SIZE_INCR : Amount of file size increase increment, in bytes
EASE_INCREMENT

_FIRST_K_ROWS_D : enable the use of dynamic proration of join
YNAMIC_PRORATIO cardinalities
N

_FIRST_SPARE_PA : first spare parameter – integer
RAMETER

_FIX_CONTROL : bug fix control parameter
_FLASHBACK_11.1 : use 11.1 flashback block new optimization scheme
_BLOCK_NEW_OPT

_FLASHBACK_ALLO : Allow enabling flashback on noarchivelog database
W_NOARCHIVELOG

_FLASHBACK_ARCH : flashback archiver table partition size
IVER_PARTITION_
SIZE

_FLASHBACK_BARR : Flashback barrier interval in seconds
IER_INTERVAL

_FLASHBACK_COPY : Number of flashback copy latches
_LATCHES

_FLASHBACK_DATA : Run Flashback Database in test mode
BASE_TEST_ONLY

_FLASHBACK_DELE : Amount of flashback log (in MB) to delete in one
TE_CHUNK_MB attempt

_FLASHBACK_DYNA : enable flashback enable code path
MIC_ENABLE

_FLASHBACK_DYNA : Simulate failures during dynamic enable
MIC_ENABLE_FAIL
URE

_FLASHBACK_ENAB : Flashback enable read ahead
LE_RA

_FLASHBACK_FORM : Chunk mega-bytes for formatting flashback logs using
AT_CHUNK_MB sync write

_FLASHBACK_FORM : Chunk mega-bytes for formatting flashback logs using
AT_CHUNK_MB_DWR delayed write
ITE

_FLASHBACK_FUZZ : Use flashback fuzzy barrier
Y_BARRIER

_FLASHBACK_GENE : flashback generation buffer size
RATION_BUFFER_S
IZE

_FLASHBACK_HINT : Flashback hint barrier percent
_BARRIER_PERCEN
T

_FLASHBACK_LOGF : flashback logfile enqueue timeout for opens
ILE_ENQUEUE_TIM
EOUT

_FLASHBACK_LOG_ : Specify Flashback log I/O error behavior
IO_ERROR_BEHAVI
OR

_FLASHBACK_LOG_ : Minimum flashback log size
MIN_SIZE

_FLASHBACK_LOG_ : flashback log rac balance factor
RAC_BALANCE_FAC
TOR

_FLASHBACK_LOG_ : Flashback log size
SIZE

_FLASHBACK_MARK : Enable flashback database marker cache
ER_CACHE_ENABLE
D

_FLASHBACK_MARK : Size of flashback database marker cache
ER_CACHE_SIZE

_FLASHBACK_MAX_ : Maximum flashback log size in bytes (OS limit)
LOG_SIZE

_FLASHBACK_MAX_ : Maximum number of flashback logs per flashback thread
N_LOG_PER_THREA
D

_FLASHBACK_MAX_ : Maximum time span between standby recovery sync for
STANDBY_SYNC_SP flashback
AN

_FLASHBACK_N_LO : Desired number of flashback logs per flashback thread
G_PER_THREAD

_FLASHBACK_PREP : Prepare Flashback logs in the background
ARE_LOG

_FLASHBACK_SIZE : Size new flashback logs based on average redo log size
_BASED_ON_REDO

_FLASHBACK_STAN : Flashback standby barrier interval in seconds
DBY_BARRIER_INT
ERVAL

_FLASHBACK_VALI : validate flashback pointers in controlfile for 11.2.0.2
DATE_CONTROLFIL database
E

_FLASHBACK_VERB : Print verbose information about flashback database
OSE_INFO

_FLASHBACK_WRIT : Flashback writer loop limit before it returns
E_MAX_LOOP_LIMI
T

_FLUSH_ILM_STAT : flush ilm stats
S

_FLUSH_PLAN_IN_ : Plan is being flushed from an AWR flush SQL
AWR_SQL

_FLUSH_REDO_TO_ : Flush redo to standby test event parameter
STANDBY

_FLUSH_UNDO_AFT : if TRUE, flush undo buffers after TX recovery
ER_TX_RECOVERY

_FORCE_ARCH_COM : Archive Compress all newly created compressed tables
PRESS

_FORCE_DATEFOLD : force use of trunc for datefolding rewrite
_TRUNC

_FORCE_HASH_JOI : force hash join to spill to disk
N_SPILL

_FORCE_HSC_COMP : compress all newly created tables
RESS

_FORCE_LOGGING_ : force logging during upgrade mode
IN_UPGRADE

_FORCE_OLTP_COM : OLTP Compress all newly created compressed tables
PRESS

_FORCE_OLTP_UPD : OLTP Compressed row optimization on update
ATE_OPT

_FORCE_RCV_INFO : Force recovery info ping to stdby
_PING

_FORCE_REWRITE_ : control new query rewrite features
ENABLE

_FORCE_SLAVE_MA : Force slave mapping for intra partition loads
PPING_INTRA_PAR
T_LOADS

_FORCE_SYS_COMP : Sys compress
RESS

_FORCE_TEMPTABL : executes concatenation of rollups using temp tables
ES_FOR_GSETS

_FORCE_TMP_SEGM : Force tmp segment loads
ENT_LOADS

_FORWARDED_2PC_ : auto-tune threshold for two-phase commit rate across
THRESHOLD RAC instances

_FOURTEENTH_SPA : fourteenth spare parameter – integer
RE_PARAMETER

_FOURTH_SPARE_P : fourth spare parameter – integer
ARAMETER

_FRAME_CACHE_TI : number of seconds a cached frame page stay in cache.
ME

_FULL_DIAG_ON_R : rim nodes have full DIA* function
IM

_FULL_PWISE_JOI : enable full partition-wise join when TRUE
N_ENABLED

_FUSION_SECURIT : Fusion Security
Y

_GBY_HASH_AGGRE : enable group-by and aggregation using hash scheme
GATION_ENABLED

_GBY_ONEKEY_ENA : enable use of one comparison of all group by keys
BLED

_GCR_CPU_MIN_FR : minimum amount of free CPU to flag an anomaly
EE

_GCR_ENABLE_HIG : if TRUE, GCR may kill foregrounds under high load
H_CPU_KILL

_GCR_ENABLE_HIG : if TRUE, GCR may enable a RM plan under high load
H_CPU_RM

_GCR_ENABLE_HIG : if TRUE, GCR may boost bg priority under high load
H_CPU_RT

_GCR_ENABLE_HIG : if TRUE, GCR may kill foregrounds under high memory
H_MEMORY_KILL load

_GCR_ENABLE_NEW : if FALSE, revert to old drm load metric
_DRM_CHECK

_GCR_ENABLE_STA : if FALSE, revert to old cpu load metric
TISTICAL_CPU_CH
ECK

_GCR_HIGH_CPU_T : minimum amount of CPU process must consume to be kill
HRESHOLD target

_GCR_HIGH_MEMOR : minimum amount of Memory process must consume to be
Y_THRESHOLD kill target

_GCR_MAX_RT_PRO : maximum number of RT DLM processes allowed by GCR
CS

_GCR_MEM_MIN_FR : minimum amount of free memory to flag an anomaly
EE

_GCR_USE_CSS : if FALSE, GCR wont register with CSS nor use any CSS
feature

_GCS_DISABLE_RE : disable remote client/shadow handles
MOTE_HANDLES

_GCS_DISABLE_SK : if TRUE, disable skip close optimization in remastering
IP_CLOSE_REMAST
ERING

_GCS_DISABLE_SW : if TRUE, disable switching to local role with a writer
ITCH_ROLE_WITH_
WRITER

_GCS_FAST_RECON : if TRUE, enable fast reconfiguration for gcs locks
FIG

_GCS_LATCHES : number of gcs resource hash latches to be allocated per
LMS process

_GCS_MIN_SLAVES : if non zero, it enables the minimum number of gcs
slaves

_GCS_PKEY_HISTO : number of pkey remastering history
RY

_GCS_PROCESS_IN : if TRUE, process gcs requests during instance recovery
_RECOVERY

_GCS_RESERVED_R : allocate the number of reserved resources in
ESOURCES reconfiguration

_GCS_RESERVED_S : allocate the number of reserved shadows in
HADOWS reconfiguration

_GCS_RESOURCES : number of gcs resources to be allocated
_GCS_RES_HASH_B : number of gcs resource hash buckets to be allocated
UCKETS

_GCS_RES_PER_BU : number of gcs resource per hash bucket
CKET

_GCS_SHADOW_LOC : number of pcm shadow locks to be allocated
KS

_GCS_TESTING : GCS testing parameter
_GC_AFFINITY_AC : if TRUE, save the time we acquired an affinity lock
QUIRE_TIME

_GC_AFFINITY_LO : if TRUE, enable object affinity
CKING

_GC_AFFINITY_LO : if TRUE, get affinity locks
CKS

_GC_AFFINITY_RA : dynamic object affinity ratio
TIO

_GC_ASYNC_SEND : send blocks asynchronously
_GC_BYPASS_READ : if TRUE, modifications bypass readers
ERS

_GC_CHECK_BSCN : if TRUE, check for stale blocks
_GC_COALESCE_RE : if TRUE, coalesce recovery reads
COVERY_READS

_GC_CPU_TIME : if TRUE, record the gc cpu time
_GC_CR_SERVER_R : if TRUE, cr server waits for a read to complete
EAD_WAIT

_GC_DEFER_PING_ : if TRUE, restrict deferred ping to index blocks only
INDEX_ONLY

_GC_DEFER_TIME : how long to defer pings for hot buffers in milliseconds
_GC_DELTA_PUSH_ : if delta >= K bytes, compress before push
COMPRESSION

_GC_DELTA_PUSH_ : max delta level for delta push
MAX_LEVEL

_GC_DELTA_PUSH_ : objects which use delta push
OBJECTS

_GC_DISABLE_S_L : if TRUE, disable S lock BRR ping check for lost write
OCK_BRR_PING_CH protect
ECK

_GC_DOWN_CONVER : if TRUE, down-convert lock after recovery
T_AFTER_KEEP

_GC_ELEMENT_PER : global cache element percent
CENT

_GC_ESCALATE_BI : if TRUE, escalates create a bid
D

_GC_FG_MERGE : if TRUE, merge pi buffers in the foreground
_GC_FG_SPIN_TIM : foreground msgq spin time
E

_GC_FLUSH_DURIN : if TRUE, flush during affinity
G_AFFINITY

_GC_FUSION_COMP : compress fusion blocks if there is free space
RESSION

_GC_GLOBAL_CHEC : if TRUE, enable global checkpoint scn
KPOINT_SCN

_GC_GLOBAL_CPU : global cpu checks
_GC_GLOBAL_LRU : turn global lru off, make it automatic, or turn it on
_GC_GLOBAL_LRU_ : global lru touch count
TOUCH_COUNT

_GC_GLOBAL_LRU_ : global lru touch time in seconds
TOUCH_TIME

_GC_INTEGRITY_C : set the integrity check level
HECKS

_GC_KEEP_RECOVE : if TRUE, make single instance crash recovery buffers
RY_BUFFERS current

_GC_LATCHES : number of latches per LMS process
_GC_LOG_FLUSH : if TRUE, flush redo log before a current block transfer
_GC_LONG_QUERY_ : threshold for long running query
THRESHOLD

_GC_MAXIMUM_BID : maximum number of bids which can be prepared
S

_GC_MAX_DOWNCVT : maximum downconverts to process at one time
_GC_NO_FAIRNESS : if TRUE, no fairness if we serve a clone
_FOR_CLONES

_GC_OBJECT_QUEU : maximum length for an object queue
E_MAX_LENGTH

_GC_OVERRIDE_FO : if TRUE, try to override force-cr requests
RCE_CR

_GC_PERSISTENT_ : if TRUE, enable persistent read-mostly locking
READ_MOSTLY

_GC_POLICY_MINI : dynamic object policy minimum activity per minute
MUM

_GC_POLICY_TIME : how often to make object policy decisions in minutes
_GC_READ_MOSTLY : if TRUE, optimize flushes for read mostly objects
_FLUSH_CHECK

_GC_READ_MOSTLY : if TRUE, enable read-mostly locking
_LOCKING

_GC_SANITY_CHEC : if TRUE, sanity check CR buffers
K_CR_BUFFERS

_GC_SAVE_CLEANO : if TRUE, save cleanout to apply later
UT

_GC_SPLIT_FLUSH : if TRUE, flush index split redo before rejecting bast
_GC_STATISTICS : if TRUE, kcl statistics are maintained
_GC_TEMP_AFFINI : if TRUE, enable global temporary affinity
TY

_GC_TRANSFER_RA : dynamic object read-mostly transfer ratio
TIO

_GC_UNDO_AFFINI : if TRUE, enable undo affinity
TY

_GC_UNDO_BLOCK_ : if TRUE, enable undo block disk reads
DISK_READS

_GC_VECTOR_READ : if TRUE, vector read current buffers
_GENERALIZED_PR : controls extensions to partition pruning for general
UNING_ENABLED predicates

_GES_DD_DEBUG : if 1 or higher enables GES deadlock detection debug
diagnostics

_GES_DEFAULT_LM : default lmds for enqueue hashing
DS

_GES_DESIGNATED : designated master for GES and GCS resources
_MASTER

_GES_DIAGNOSTIC : if TRUE enables GES diagnostics
S

_GES_DIAGNOSTIC : systemstate level on global enqueue diagnostics blocked
S_ASM_DUMP_LEVE by ASM
L

_GES_DIRECT_FRE : if TRUE, free each resource directly to the freelist
E

_GES_DIRECT_FRE : string of resource types(s) to directly free to the
E_RES_TYPE freelist

_GES_DUMP_OPEN_ : if TRUE, dump open locks for the LCK process during
LOCKS shutdown

_GES_FGGL : DLM fg grant lock on/off
_GES_FREEABLE_R : if TRUE, free dynamic resource chunks which are
ES_CHUNK_FREE freeable

_GES_FREEABLE_R : time interval for freeing freeable dynamic resource
ES_CHUNK_FREE_I chunks
NTERVAL

_GES_GATHER_RES : if TRUE, gather resource reuse statistics
_REUSE_STATS

_GES_HASH_GROUP : enqueue hash table groups
S

_GES_HEALTH_CHE : if greater than 0 enables GES system health check
CK

_GES_LMD_MAPPIN : enqueue to lmd mapping
G

_GES_NRES_DIVID : how to divide number of enqueue resources among hash
E tables

_GES_NUM_BLOCKE : number of blockers to be killed for hang resolution
RS_TO_KILL

_GES_RESOURCE_M : enable different level of ges res memory optimization
EMORY_OPT

_GES_SERVER_PRO : number of background global enqueue server processes
CESSES

_GLOBALINDEX_PN : enables filter for global index with partition extended
UM_FILTER_ENABL syntax
ED

_GLOBAL_HANG_AN : the interval at which global hang analysis is run
ALYSIS_INTERVAL
_SECS

_GRANT_SECURE_R : Disallow granting of SR to NSR
OLE

_GROUPBY_NOPUSH : groupby nopushdown cut ratio
DOWN_CUT_RATIO

_GROUPBY_ORDERB : groupby/orderby don’t combine threshold
Y_COMBINE

_GSM : GSM descriptions
_GSM_CONFIG_VER : version of gsm config
S

_GSM_CPU_THRESH : CPU busy threshold
_GSM_DRV_INTERV : metric derived values interval
AL

_GSM_MAX_INSTAN : maximum number of instances per database in gsm cloud
CES_PER_DB

_GSM_MAX_NUM_RE : maximum number of regions in gsm cloud
GIONS

_GSM_REGION_LIS : List of GSM Regions
T

_GSM_SRLAT_THRE : Single block read latency threshold
SH

_GSM_THRESH_RES : threshold resource percentage
PCT

_GSM_THRESH_ZON : threshold zone
E

_GS_ANTI_SEMI_J : enable anti/semi join for the GS query
OIN_ALLOWED

_GWM_SPARE1      : gsm spare 1
_GWM_SPARE2      : gsm spare 2
_GWM_SPARE3      : gsm spare 3
_HANG_ANALYSIS_ : hang analysis num call stacks
NUM_CALL_STACKS

_HANG_BASE_FILE : Number of trace files for the normal base trace file
_COUNT

_HANG_BASE_FILE : File space limit for current normal base trace file
_SPACE_LIMIT

_HANG_BOOL_SPAR : Hang Management 1
E1

_HANG_CROSS_BOU : Hang Management Cross Boundary detection
NDARY_HANG_DETE
CTION_ENABLED

_HANG_DELAY_RES : Hang Management delays hang resolution for library
OLUTION_FOR_LIB cache
CACHE

_HANG_DETECTION : Hang Management detection
_ENABLED

_HANG_DETECTION : Hang Management detection interval in seconds
_INTERVAL

_HANG_HANG_ANAL : if TRUE hang manager outputs hang analysis hang chains
YZE_OUTPUT_HANG
_CHAINS

_HANG_HILOAD_PR : Hang Management high load or promoted ignored hang
OMOTED_IGNORED_ count
HANG_COUNT

_HANG_HIPRIOR_S : Hang Management high priority session attribute list
ESSION_ATTRIBUT
E_LIST

_HANG_IGNORED_H : Time in seconds ignored hangs must persist after
ANGS_INTERVAL verification

_HANG_IGNORED_H : Hang Management ignored hang count
ANG_COUNT

_HANG_INT_SPARE : Hang Management 2
2

_HANG_LOG_VERIF : Hang Management log verified hangs to alert log
IED_HANGS_TO_AL
ERT

_HANG_LONG_WAIT : Long session wait time threshold in seconds
_TIME_THRESHOLD

_HANG_LWS_FILE_ : Number of trace files for long waiting sessions
COUNT

_HANG_LWS_FILE_ : File space limit for current long waiting session trace
SPACE_LIMIT file

_HANG_MONITOR_A : Time in seconds ignored hangs must persist after
RCHIVING_RELATE verification
D_HANG_INTERVAL

_HANG_MSG_CHECK : enable hang graph message checksum
SUM_ENABLED

_HANG_RESOLUTIO : Hang Management hang resolution allow archiving issue
N_ALLOW_ARCHIVI termination
NG_ISSUE_TERMIN
ATION

_HANG_RESOLUTIO : Hang Management hang resolution confidence promotion
N_CONFIDENCE_PR
OMOTION

_HANG_RESOLUTIO : Hang Management hang resolution global hang confidence
N_GLOBAL_HANG_C promotion
ONFIDENCE_PROMO
TION

_HANG_RESOLUTIO : Hang Management hang resolution policy
N_POLICY

_HANG_RESOLUTIO : Hang Management hang resolution promote process
N_PROMOTE_PROCE termination
SS_TERMINATION

_HANG_RESOLUTIO : Hang Management hang resolution scope
N_SCOPE

_HANG_SIGNATURE : Hang Signature List matched output frequency
_LIST_MATCH_OUT
PUT_FREQUENCY

_HANG_STATISTIC : Hang Management statistics collection interval in
S_COLLECTION_IN seconds
TERVAL

_HANG_STATISTIC : Hang Management statistics collection moving average
S_COLLECTION_MA alpha
_ALPHA

_HANG_STATISTIC : Hang Management statistics high IO percentage threshold
S_HIGH_IO_PERCE
NTAGE_THRESHOLD

_HANG_TERMINATE : Hang Management terminates sessions allowing replay
_SESSION_REPLAY
_ENABLED

_HANG_VERIFICAT : Hang Management verification interval in seconds
ION_INTERVAL

_HARD_PROTECTIO : if TRUE enable H.A.R.D specific format changes
N

_HASHOPS_PREFET : maximum no of rows whose relevant memory locations are
CH_SIZE prefetched

_HASH_JOIN_ENAB : enable/disable hash join
LED

_HASH_MULTIBLOC : number of blocks hash join will read/write at once
K_IO_COUNT

_HB_REDO_MSG_IN : BOC HB redo message interval in ms
TERVAL

_HEATMAP_FORMAT : heatmap related – to be used by oracle dev only
_1BLOCK

_HEATMAP_MIN_MA : Internal testing only
XSIZE

_HEUR_DEADLOCK_ : the heuristic wait time per node for deadlock
RESOLUTION_SECS resolution

_HIGHRES_DRIFT_ : allowed highres timer drift for VKTM
ALLOWED_SEC

_HIGHTHRESHOLD_ : high threshold undo_retention in seconds
UNDORETENTION

_HIGH_PRIORITY_ : High Priority Process Name Mask
PROCESSES

_HIGH_SERVER_TH : high server thresholds
RESHOLD

_HJ_BIT_FILTER_ : hash-join bit filtering threshold (0 always enabled)
THRESHOLD

_HM_ANALYSIS_OR : the oradebug system state level for hang manager hang
ADEBUG_SYS_DUMP analysis
_LEVEL

_HM_XM_ENABLED : If TRUE, DIA0 allows message exchanges across DB/ASM
boundary

_HWM_SYNC_THRES : HWM synchronization threshold in percentage
HOLD

_IDLE_SESSION_K : enables or disables resource manager session idle limit
ILL_ENABLED checks

_IDL_CONVENTION : enable conventional index maintenance for insert direct
AL_INDEX_MAINTE load
NANCE

_IDXRB_ROWINCR : proportionality constant for dop vs. rows in index
rebuild

_IGNORE_DESC_IN : ignore DESC in indexes, sort those columns ascending
_INDEX anyhow

_IGNORE_EDITION : ignore schema’s edition-enabled status during EV
_ENABLED_FOR_EV creation
_CREATION

_IGNORE_FG_DEPS : ignore fine-grain dependencies during invalidation
_ILMFLUSH_STAT_ : ILM flush statistics limit – Internal testing only
LIMIT

_ILMSET_STAT_LI : ILM set statistics limit – Internal testing only
MIT

_ILMSTAT_MEMLIM : Percentage of shared pool for use by ILM Statistics
IT

_ILM_FILTER_TIM : Upper filter time for ILM block compression
E

_ILM_FILTER_TIM : Lower filter time for ILM block compression
E_LOWER

_ILM_MEM_LIMIT : percentage of the max shared pool heat-map can use –
internal

_ILM_POLICY_NAM : User specified ILM policy name
E

_IMAGE_REDO_GEN : Image redo generation delay in centi-seconds (direct
_DELAY write mode)

_IMMEDIATE_COMM : if TRUE, propagate commit SCN immediately
IT_PROPAGATION

_IMPROVED_OUTER : improved outer-join cardinality calculation
JOIN_CARD

_IMPROVED_ROW_L : enable the improvements for computing the average row
ENGTH_ENABLED length

_IMR_ACTIVE : Activate Instance Membership Recovery feature
_IMR_AVOID_DOUB : Avoid device voting for CSS reconfig during IMR
LE_VOTING

_IMR_CONTROLFIL : IMR controlfile access wait time in seconds
E_ACCESS_WAIT_T
IME

_IMR_DEVICE_TYP : Type of device to be used by IMR
E

_IMR_DISKVOTE_I : IMR disk voting implementation method
MPLEMENTATION

_IMR_DISK_VOTIN : Maximum wait for IMR disk voting (seconds)
G_INTERVAL

_IMR_EVICTED_ME : IMR issue evicted member kill after a wait
MBER_KILL

_IMR_EVICTED_ME : IMR evicted member kill wait time in seconds
MBER_KILL_WAIT

_IMR_EXTRA_RECO : Extra reconfiguration wait in seconds
NFIG_WAIT

_IMR_HIGHLOAD_T : IMR system highload threshold
HRESHOLD

_IMR_MAX_RECONF : Maximum Reconfiguration delay (seconds)
IG_DELAY

_IMR_RR_HOLDER_ : IMR max time instance is allowed to hold RR lock in
KILL_TIME seconds

_IMR_SPLITBRAIN : Maximum wait for split-brain resolution (seconds)
_RES_WAIT

_IMR_SYSTEMLOAD : Perform the system load check during IMR
_CHECK

_IMU_POOLS : in memory undo pools
_INCREMENTAL_RE : minimum number of writes for incremental recovery ckpt
COVERY_CKPT_MIN every second
_BATCH

_INDEX_JOIN_ENA : enable the use of index joins
BLED

_INDEX_LOAD_BUF : index load buf oltp sacrifice pct
_OLTP_SACRIFICE
_PCT

_INDEX_LOAD_BUF : index load buf and comp oltp under-estimation pct
_OLTP_UNDER_PCT

_INDEX_MAX_INC_ : max itl expand percentage soft limit during index
TRANS_PCT insert

_INDEX_PARTITIO : Enables large extent allocation for partitioned indices
N_LARGE_EXTENTS

_INDEX_PREFETCH : index prefetching factor
_FACTOR

_INDEX_SCAN_CHE : check and skip corrupt blocks during index scans
CK_SKIP_CORRUPT

_INDEX_SCAN_CHE : check stopkey during index range scans
CK_STOPKEY

_INIT_GRANULE_I : number of granules to process for deferred cache
NTERVAL

_INIT_SQL_FILE : File containing SQL statements to execute upon database
creation

_INJECT_STARTUP : inject fault in the startup code
_FAULT

_INLINE_SQL_IN_ : inline SQL in PL/SQL
PLSQL

_INPLACE_UPDATE : inplace update retry for ora1551
_RETRY

_INQUIRY_RETRY_ : if greater than 0 enables inquiry retry after specified
INTERVAL interval

_INSERT_ENABLE_ : during parallel inserts high water marks are brokered
HWM_BROKERED

_INST_LOCKING_P : period an instance can retain a newly acquired level1
ERIOD bitmap

_INTERCONNECT_C : if TRUE, checksum interconnect blocks
HECKSUM

_INTRAPART_PDML : Enable intra-partition updates/deletes
_ENABLED

_INTRAPART_PDML : Enable intra-partition updates/deletes with random
_RANDOMLOCAL_EN local dist
ABLED

_IN_MEMORY_TBS_ : FALSE – disable fast path for alter tablespace read
SEARCH only

_IN_MEMORY_UNDO : Make in memory undo for top level transactions
_IOCALIBRATE_IN : iocalibrate init I/Os per process
IT_IOS

_IOCALIBRATE_MA : iocalibrate max I/Os per process
X_IOS

_IOQ_FANIN_MULT : IOQ miss count before a miss exception
IPLIER

_IORM_TOUT : IORM scheduler timeout value in msec
_IOR_SERIALIZE_ : inject fault in the ior serialize code
FAULT

_IOSLAVE_BATCH_ : Per attempt IOs picked
COUNT

_IOSLAVE_ISSUE_ : IOs issued before completion check
COUNT

_IO_INTERNAL_TE : I/O internal testing parameter
ST

_IO_OSD_PARAM : OSD specific parameter
_IO_OUTLIER_THR : Latency threshold for io_outlier table
ESHOLD

_IO_RESOURCE_MA : io resource manager always on
NAGER_ALWAYS_ON

_IO_SHARED_POOL : Size of I/O buffer pool from SGA
_SIZE

_IO_SLAVES_DISA : Do not use I/O slaves
BLED

_IO_STATISTICS : if TRUE, ksfd I/O statistics are collected
_IPC_FAIL_NETWO : Simulate cluster network failer
RK

_IPC_TEST_FAILO : Test transparent cluster network failover
VER

_IPC_TEST_MULT_ : simulate multiple cluster networks
NETS

_IPDDB_ENABLE : Enable IPD/DB data collection
_JOB_QUEUE_INTE : Wakeup interval in seconds for job queue co-ordinator
RVAL

_K2Q_LATCHES : number of k2q latches
_KA_ALLOW_REENA : reenability of kernel accelerator service after disable
BLE

_KA_COMPATIBILI : kernel accelerator compatibility operation requirement
TY_REQUIREMENT

_KA_DOORBELL : kernel accelerator doorbell mode
_KA_LOCKS_PER_S : locks per sector in kernel accelerator
ECTOR

_KA_MODE : kernel accelerator mode
_KA_MSG_REAP_CO : maximum number of KA messages to receive and process
UNT per wait

_KA_PBATCH_MESS : kernel accelerator perform pbatch messages
AGES

_KCFIS_AUTOMEM_ : Set auto memory management control for kcfis memory
LEVEL allocation

_KCFIS_BLOCK_DU : Smart IO block dump level
MP_LEVEL

_KCFIS_CACHING_ : enable kcfis intra-scan session caching
ENABLED

_KCFIS_CELLOFLS : Enable offload server usage for passthru operations
RV_PASSTHRU_ENA
BLED

_KCFIS_CELLOFLS : Enable offload server usage for offload operations
RV_USAGE_ENABLE
D

_KCFIS_CELL_PAS : Allow dataonly passthru for smart scan
STHRU_DATAONLY

_KCFIS_CELL_PAS : Do not perform smart IO filtering on the cell
STHRU_ENABLED

_KCFIS_CELL_PAS : Enable automatic passthru mode when cell CPU util is
STHRU_FROMCPU_E too high
NABLED

_KCFIS_CONTROL1 : Kcfis control1
_KCFIS_CONTROL2 : Kcfis control2
_KCFIS_CONTROL3 : Kcfis control3
_KCFIS_CONTROL4 : Kcfis control4
_KCFIS_CONTROL5 : Kcfis control5
_KCFIS_CONTROL6 : Kcfis control6
_KCFIS_DISABLE_ : Don’t use platform-specific decryption on the storage
PLATFORM_DECRYP cell
TION

_KCFIS_DUMP_COR : Dump any corrupt blocks found during smart IO
RUPT_BLOCK

_KCFIS_FAST_RES : Enable smart scan optimization for fast response (first
PONSE_ENABLED rows)

_KCFIS_FAST_RES : Fast response – The size of the first IO in logical
PONSE_INITIOSIZ blocks
E

_KCFIS_FAST_RES : Fast response – (next IO size = current IO size * this
PONSE_IOSIZEMUL parameter)
T

_KCFIS_FAST_RES : Fast response – the number of IOs after which smartIO
PONSE_THRESHOLD is used

_KCFIS_FAULT_CO : Fault Injection Control
NTROL

_KCFIS_IOREQS_T : Enable Smart IO requests throttling
HROTTLE_ENABLED

_KCFIS_IO_PREFE : Smart IO prefetch size for a cell
TCH_SIZE

_KCFIS_KEPT_IN_ : Enable usage of cellsrv flash cache for kept objects
CELLFC_ENABLED

_KCFIS_LARGE_PA : enable large payload to be passed to cellsrv
YLOAD_ENABLED

_KCFIS_MAX_CACH : Sets the maximum number of kcfis sessions cached
ED_SESSIONS

_KCFIS_MAX_OUT_ : Sets the maximum number of outstanding translations in
TRANSLATIONS kcfis

_KCFIS_NONKEPT_ : Enable use of cellsrv flash cache for non-kept objects
IN_CELLFC_ENABL
ED

_KCFIS_OSS_IO_S : KCFIS OSS I/O size
IZE

_KCFIS_QM_PRIOR : Prioritize Quaranitine Manager system plan
ITIZE_SYS_PLAN

_KCFIS_QM_USER_ : Quaranitine Manager user plan name
PLAN_NAME

_KCFIS_RDBMS_BL : Use block IO instead of smart IO in the smart IO module
OCKIO_ENABLED on RDBMS

_KCFIS_READ_BUF : KCFIS Read Buffer (per session) memory limit in bytes
FER_LIMIT

_KCFIS_SPAWN_DE : Decides whether to spawn the debugger at kcfis
BUGGER initialize

_KCFIS_STATS_LE : sets kcfis stats level
VEL

_KCFIS_STORAGEI : Debug mode for storage index on the cell
DX_DIAG_MODE

_KCFIS_STORAGEI : Don’t use storage index optimization on the storage
DX_DISABLED cell

_KCFIS_TEST_CON : kcfis tst control1
TROL1

_KCFIS_TRACE_BU : KCFIS tracing bucket size in bytes
CKET_SIZE

_KCL_COMMIT : if TRUE, call kjbcommit
_KCL_CONSERVATI : if TRUE, conservatively log flush before CR serving
VE_LOG_FLUSH

_KCL_DEBUG : if TRUE, record le history
_KCL_INDEX_SPLI : if TRUE, reject pings on blocks in middle of a split
T

_KDBL_ENABLE_PO : allocate dbas after populating data buffers
ST_ALLOCATION

_KDIC_SEGARR_SZ : size threshold for segmented arrays for
seg_info_kdicctx

_KDIS_REJECT_LE : b+tree level to enable rejection limit
VEL

_KDIS_REJECT_LI : #block rejections in space reclamation before segment
MIT extension

_KDIS_REJECT_OP : enable rejection heuristic for branch splits
S

_KDIZOLTP_UNCOM : kdizoltp uncomp sentinal frequency
PSENTINAL_FREQ

_KDI_AVOID_BLOC : avoid index block checking on sensitive opcodes
K_CHECKING

_KDLF_READ_FLAG : kdlf read flag
_KDLI_ALLOW_COR : allow corrupt filesystem_logging data blocks during
RUPT read/write

_KDLI_BUFFER_IN : use buffer injection for CACHE [NO]LOGGING lobs
JECT

_KDLI_CACHEABLE : minimum lob length for inode cacheability
_LENGTH

_KDLI_CACHE_INO : cache inode state across calls
DE

_KDLI_CACHE_REA : minimum lob size for cache->nocache read (0 disables
D_THRESHOLD heuristic)

_KDLI_CACHE_SIZ : maximum #entries in inode cache
E

_KDLI_CACHE_VER : verify cached inode via deserialization
IFY

_KDLI_CACHE_WRI : minimum lob size for cache->nocache write (0 disables
TE_THRESHOLD heuristic)

_KDLI_CHECKPOIN : do not invalidate cache buffers after write
T_FLUSH

_KDLI_DBC : override db_block_checking setting for securefiles
_KDLI_DELAY_FLU : delay flushing cache writes to direct-write lobs
SHES

_KDLI_DESCN_ADJ : coalesce extents with deallocation scn adjustment
_KDLI_FLUSH_CAC : flush cache-reads data blocks after load
HE_READS

_KDLI_FLUSH_INJ : flush injected buffers of CACHE NOLOGGING lobs before
ECTIONS commit

_KDLI_FORCE_CR : force CR when reading data blocks of direct-write lobs
_KDLI_FORCE_CR_ : force CR when reading metadata blocks of direct-write
META lobs

_KDLI_FORCE_STO : force storage settings for all lobs
RAGE

_KDLI_FULL_READ : maximum lob size for full readahead
AHEAD_THRESHOLD

_KDLI_INJECT_AS : inject asserts into the inode
SERT

_KDLI_INJECT_BA : buffer injection batch size [1, KCBNEWMAX]
TCH

_KDLI_INJECT_CR : inject crashes into the inode
ASH

_KDLI_INLINE_XF : allow inline transformed lobs
M

_KDLI_INODE_PRE : inline inode evolution preference (data, headless, lhb)
FERENCE

_KDLI_INPLACE_O : maximum inplace overwrite size (> chunksize)
VERWRITE

_KDLI_ITREE_ENT : #entries in lhb/itree blocks (for testing only)
RIES

_KDLI_MEMORY_PR : trace accesses to inode memory outside kdli API
OTECT functions

_KDLI_MTS_SO : use state objects in shared server for asyncIO
pipelines

_KDLI_ONEBLK : allocate chunks as single blocks
_KDLI_PREALLOCA : preallocation mode for lob growth
TION_MODE

_KDLI_PREALLOCA : percentage preallocation [0 .. inf) for lob growth
TION_PCT

_KDLI_RALC_LENG : lob length threshold to trigger rounded allocations
TH

_KDLI_RALC_ROUN : rounding granularity for rounded allocations
DING

_KDLI_RCI_LOBMA : #entries in RCI lobmap before migration to lhb
P_ENTRIES

_KDLI_READAHEAD : shared/cached IO readahead limit
_LIMIT

_KDLI_READAHEAD : shared/cached IO readahead strategy
_STRATEGY

_KDLI_RECENT_SC : use recent (not dependent) scns for block
N format/allocation

_KDLI_RESHAPE : reshape an inode to inline or headless on length
truncation

_KDLI_SAFE_CALL : invoke inode read/write callbacks safely
BACKS

_KDLI_SIO_ASYNC : asynchronous shared IO
_KDLI_SIO_BACKO : use exponential backoff when attempting SIOP
FF allocations

_KDLI_SIO_BPS    : maximum blocks per IO slot
_KDLI_SIO_DOP    : degree-of-parallelism in the SIO keep pool
_KDLI_SIO_FBWRI : percentage of buffer used for direct writes in
TE_PCT              flashback-db

_KDLI_SIO_FGIO : reap asynchronous IO in the foreground
_KDLI_SIO_FILEO : shared IO fileopen mode: datasync vs nodatasync vs
PEN async

_KDLI_SIO_FLUSH : enable shared IO pool operations
_KDLI_SIO_FREE : free IO buffers when not in active use
_KDLI_SIO_MIN_R : shared IO pool read threshold
EAD

_KDLI_SIO_MIN_W : shared IO pool write threshold
RITE

_KDLI_SIO_NBUFS : maximum #IO buffers to allocate per session
_KDLI_SIO_NIODS : maximum #IO descriptors to allocate per session
_KDLI_SIO_ON : enable shared IO pool operations
_KDLI_SIO_PGA : use PGA allocations for direct IO
_KDLI_SIO_PGA_T : PGA allocations come from toplevel PGA heap
OP

_KDLI_SIO_STRAT : shared IO strategy: block vs. extent
EGY

_KDLI_SIO_WRITE : percentage of buffer used for direct writes
_PCT

_KDLI_SMALL_CAC : size limit of small inode cache
HE_LIMIT

_KDLI_SORT_DBAS : sort dbas during chunkification
_KDLI_SPACE_CAC : maximum size of the space cache in #blocks
HE_LIMIT

_KDLI_SQUEEZE    : compact lobmap extents with contiguous dbas
_KDLI_STOP_BSZ   : undocumented parameter for internal use only
_KDLI_STOP_DBA   : undocumented parameter for internal use only
_KDLI_STOP_FSZ   : undocumented parameter for internal use only
_KDLI_STOP_NIO   : undocumented parameter for internal use only
_KDLI_STOP_TSN   : undocumented parameter for internal use only
_KDLI_TIMER_DMP : dump inode timers on session termination
_KDLI_TIMER_TRC : trace inode timers to uts/tracefile
_KDLI_TRACE      : inode trace level
_KDLI_VLL_DIREC : use skip-navigation and direct-positioning in
T                   vll-domain

_KDLU_MAX_BUCKE : UTS kdlu bucket size
T_SIZE

_KDLU_MAX_BUCKE : UTS kdlu bucket size for mts
T_SIZE_MTS

_KDLU_TRACE_LAY : UTS kdlu per-layer trace level
ER

_KDLU_TRACE_SYS : UTS system dump
TEM

_KDLWP_FLUSH_TH : WGC flush threshold in bytes
RESHOLD

_KDLW_ENABLE_KS : enable ksi locking for lobs
I_LOCKING

_KDLW_ENABLE_WR : enable lob write gathering for sql txns
ITE_GATHERING

_KDLXP_CMP_SUBU : size of compression sub-unit in bytes
NIT_SIZE

_KDLXP_DEDUP_FL : deduplication flush threshold in bytes
USH_THRESHOLD

_KDLXP_DEDUP_HA : secure hash algorithm for deduplication – only on
SH_ALGO SecureFiles

_KDLXP_DEDUP_IN : deduplication pct size increase by which inlining
L_PCTFREE avoided

_KDLXP_DEDUP_PR : deduplication prefix hash threshold in bytes
EFIX_THRESHOLD

_KDLXP_DEDUP_WA : deduplication length to allow write-append
PP_LEN

_KDLXP_LOBCMPAD : enable adaptive compression – only on SecureFiles
P

_KDLXP_LOBCMPLE : Default securefile compression
VEL

_KDLXP_LOBCMPRC : Default securefile compression map version
IVER

_KDLXP_LOBCOMPR : enable lob compression – only on SecureFiles
ESS

_KDLXP_LOBDEDUP : enable lob deduplication – only on SecureFiles
LICATE

_KDLXP_LOBDEDUP : enable deduplicate validate – only on SecureFiles
VALIDATE

_KDLXP_LOBENCRY : enable lob encryption – only on SecureFiles
PT

_KDLXP_MINCMP : minimum comp ratio in pct – only on SecureFiles
_KDLXP_MINCMPLE : minimum loblen to compress – only on SecureFiles
N

_KDLXP_MINXFM_S : minimum transformation size in bytes
IZE

_KDLXP_SPARE1 : deduplication spare 1
_KDLXP_UNCMP : lob data uncompressed – only on SecureFiles
_KDLXP_XFMCACHE : enable xfm cache – only on SecureFiles
_KDTGSP_RETRIES : max number of retries in kdtgsp if space returns same
block

_KDT_BUFFERING : control kdt buffering for conventional inserts
_KDU_ARRAY_DEPT : array update retry recursion depth limits
H

_KDZ_HCC_FLAGS : Miscellaneous HCC flags
_KDZ_HCC_TRACK_ : Enable rowid tracking during updates
UPD_RIDS

_KDZ_PRED_NROWS : Number of rows to predicate at a time in kdzt
_KDZ_PROJ_NROWS : Number of rows to project at a time in kdzt
_KD_SYMTAB_CHK : enable or disable symbol table integrity block check
_KEBM_NSTRIKES : kebm # strikes to auto suspend an action
_KEBM_SUSPENSIO : kebm auto suspension time in seconds
N_TIME

_KECAP_CACHE_SI : Workload Replay INTERNAL parameter used to set memory
ZE usage in Application Replay

_KEEP_REMOTE_CO : remote column size does not get modified
LUMN_SIZE

_KERNEL_MESSAGE : kernel message network driver
_NETWORK_DRIVER

_KES_PARSE_MODE : SQL Tune/SPA KES Layer Parse Model control parameter
L

_KFFMAP_HASH_SI : size of kffmap_hash table
ZE

_KFFMLK_HASH_SI : size of kffmlk_hash table
ZE

_KFFMOP_CHUNKS : number of chunks of kffmop’s
_KFFMOP_HASH_SI : size of kffmop_hash table
ZE

_KFM_DISABLE_SE : disable set fence calls and revert to default (process
T_FENCE fence)

_KGHDSIDX_COUNT : max kghdsidx count
_KGLSIM_MAXMEM_ : max percentage of shared pool size to be used for KGL
PERCENT advice

_KGL_BUCKET_COU : Library cache hash table bucket count
NT (2^_kgl_bucket_count * 256)

_KGL_CAP_HD_ALO : capture stacks for library cache handle allocation
_STACKS

_KGL_CLUSTER_LO : Library cache support for cluster lock
CK

_KGL_CLUSTER_LO : Library cache support for cluster lock read mostly
CK_READ_MOSTLY optimization

_KGL_CLUSTER_PI : Library cache support for cluster pins
N

_KGL_DEBUG : Library cache debugging
_KGL_FIXED_EXTE : fixed extent size for library cache memory allocations
NTS

_KGL_HASH_COLLI : Library cache name hash collision possible
SION

_KGL_HEAP_SIZE : extent size for library cache heap 0
_KGL_HOT_OBJECT : Number of copies for the hot object
_COPIES

_KGL_KQR_CAP_SO : capture stacks for library and row cache state objects
_STACKS

_KGL_LARGE_HEAP : maximum heap size before KGL writes warnings to the
_WARNING_THRESH alert log
OLD

_KGL_LATCH_COUN : number of library cache latches
T

_KGL_MESSAGE_LO : RAC message lock count
CKS

_KGL_MIN_CACHED : Minimum cached SO count. If > 1 can help find SO
_SO_COUNT corruptions

_KGL_TIME_TO_WA : time to wait for locks and pins before timing out
IT_FOR_LOCKS

_KGSB_THRESHOLD : threshold size for base allocator
_SIZE

_KGX_LATCHES : # of mutex latches if CAS is not supported.
_KILL_CONTROLFI : enable killing controlfile enqueue blocker on timeout
LE_ENQUEUE_BLOC
KER

_KILL_DIAGNOSTI : timeout delay in seconds before killing enqueue blocker
CS_TIMEOUT

_KILL_ENQUEUE_B : if greater than 0 enables killing enqueue blocker
LOCKER

_KILL_JAVA_THRE : Kill Java threads and do sessionspace migration at end
ADS_ON_EOC of call

_KILL_SESSION_D : Process dump on kill session immediate
UMP

_KJAC_FORCE_OUT : if TRUE, enable to run force outcome on the current
COME_CURRENT_SE session
SSION

_KJDD_CALL_STAC : Enables printing of short call stack with the WFG
K_DUMP_ENABLED

_KJDD_WFG_DUMP_ : To control the way Wait-For_Graph is dumped
CNTRL

_KJLTMAXGT : record latch requests that takes longer than this many
us

_KJLTMAXHT : record latch reqeust that are held longer than this
many us

_KJLTON          : track DLM latch usage on/off
_KKFI_TRACE      : trace expression substitution
_KKS_FREE_CURSO : percentage of cursor stats buckets to scan on each
R_STAT_PCT          load, in 1/10th of a percent

_KOKLI_CACHE_SI : Size limit of ADT Table Lookup Cache
ZE

_KOKLN_CURRENT_ : Make all LOB reads for this session ‘current’ reads
READ

_KOLFUSESLF : allow kolf to use slffopen
_KQDSN_MAX_INST : maximum bits used for instance value in sequence
ANCE_BITS partition

_KQDSN_MIN_INST : minimum bits used for instance value in sequence
ANCE_BITS partition

_KQDSN_PARTITIO : ratio of instance to session bits in sequence partition
N_RATIO

_KQL_SUBHEAP_TR : tracing level for library cache subheap level pins
ACE

_KQR_OPTIMISTIC : optimistic reading of row cache objects
_READS

_KSB_RESTART_CL : process uptime for restarts
EAN_TIME

_KSB_RESTART_PO : process restart policy times in seconds
LICY_TIMES

_KSDXDOCMD_DEFA : default timeout for internal oradebug commands
ULT_TIMEOUT_MS

_KSDXDOCMD_ENAB : if TRUE ksdxdocmd* invocations are enabled
LED

_KSDXW_CINI_FLG : ksdxw context initialization flag
_KSDXW_NBUFS     : ksdxw number of buffers in buffered mode
_KSDXW_NUM_PGW   : number of watchpoints on a per-process basis
_KSDXW_NUM_SGW   : number of watchpoints to be shared by all processes
_KSDXW_STACK_DE : number of PCs to collect in the stack when watchpoint
PTH                 is hit

_KSDX_CHARSET_R : ratio between the system and oradebug character set
ATIO

_KSD_TEST_PARAM : KSD test parmeter
_KSE_DIE_TIMEOU : amount of time a dying process is spared by PMON (in
T centi-secs)

_KSE_PC_TABLE_S : kse pc table cache size
IZE

_KSE_SIGNATURE_ : number of entries in the kse stack signature cache
ENTRIES

_KSE_SIGNATURE_ : number of stack frames to cache per kse signature
LIMIT

_KSE_SNAP_RING_ : should error snap ring entries show a short stack trace
RECORD_STACK

_KSE_SNAP_RING_ : ring buffer to debug internal error 17090
SIZE

_KSE_TRACE_INT_ : enables soft assert of KGECLEAERERROR is cleares an
MSG_CLEAR interrupt message

_KSFD_VERIFY_WR : verify asynchronous writes issued through ksfd
ITE

_KSIPC_LIBIPC_P : over-ride default location of libipc
ATH

_KSIPC_MODE : ksipc mode
_KSIPC_SPARE_PA : ksipc spare param 1
RAM1

_KSIPC_SPARE_PA : ksipc spare param 2
RAM2

_KSIPC_WAIT_FLA : tune ksipcwait
GS

_KSI_CLIENTLOCK : if TRUE, DLM-clients can provide the lock memory
S_ENABLED

_KSI_TRACE : KSI trace string of lock type(s)
_KSI_TRACE_BUCK : memory tracing: use ksi-private or rdbms-shared bucket
ET

_KSI_TRACE_BUCK : size of the KSI trace bucket
ET_SIZE

_KSMB_DEBUG : ksmb debug flags
_KSMD_PROTECT_M : KSMD protect mode for catching stale access
ODE

_KSMG_GRANULE_L : granule locking status
OCKING_STATUS

_KSMG_GRANULE_S : granule size in bytes
IZE

_KSMG_LOCK_CHEC : timeout action interval in minutes
K_INTERVAL

_KSMG_LOCK_REAC : repeat count for acquisition of locks
QUIRE_COUNT

_KSMLSAF : KSM log alloc and free
_KSM_POST_SGA_I : seconds to delay instance startup at sga initialization
NIT_NOTIF_DELAY (post)
_SECS

_KSM_PRE_SGA_IN : seconds to delay instance startup at sga initialization
IT_NOTIF_DELAY_ (pre)
SECS

_KSPOL_TAC_TIME : timeouts for TAC registerd by kspol
OUT

_KSR_UNIT_TEST_ : number of ksr unit test processes
PROCESSES

_KSS_CALLSTACK_ : state object callstack trace type
TYPE

_KSS_QUIET : if TRUE access violations during kss dumps are not
recorded

_KSUITM_ADDON_T : command to execute when dead processes don’t go away
RCCMD

_KSUITM_DONT_KI : delay inst. termination to allow processes to dump
LL_DUMPER

_KSU_DIAG_KILL_ : number of seconds ksuitm waits before killing diag
TIME

_KSVPPKTMODE : ksv internal pkt test
_KSV_DYNAMIC_FL : ksv dynamic flags 1 – override default behavior
AGS1

_KSV_MAX_SPAWN_ : bg slave spawn failure limit
FAIL_LIMIT

_KSV_POOL_HANG_ : bg slave pool terminate timeout
KILL_TO

_KSV_POOL_WAIT_ : bg slave pool wait limit
TIMEOUT

_KSV_SLAVE_EXIT : slave exit timeout
_TIMEOUT

_KSV_SPAWN_CONT : control all spawning of background slaves
ROL_ALL

_KSV_STATIC_FLA : ksv static flags 1 – override default behavior
GS1

_KSXP_COMPAT_FL : ksxp compat flags
AGS

_KSXP_CONTROL_F : modify ksxp behavior
LAGS

_KSXP_DIAGMODE : set to OFF to disable automatic slowsend diagnostics
_KSXP_DISABLE_C : disable CLSS interconnects
LSS

_KSXP_DISABLE_D : disable dynamic loadin of lib skgxp
YNAMIC_LOADING

_KSXP_DISABLE_I : disable ipc statistics
PC_STATS

_KSXP_DISABLE_R : disable possibility of starting rolling migration
OLLING_MIGRATIO
N

_KSXP_DUMP_TIME : set timeout for kjzddmp request
OUT

_KSXP_DYNAMIC_S : dynamic skgxp parameters
KGXP_PARAM

_KSXP_IF_CONFIG : ksxp if config flags
_KSXP_INIT_STAT : initial number arrays for ipc statistics
S_BKTS

_KSXP_LWIPC_ENA : enable lwipc for KSXP
BLED

_KSXP_MAX_STATS : max. arrays for ipc statistics
_BKTS

_KSXP_PING_ENAB : disable dynamic loadin of lib skgxp
LE

_KSXP_PING_POLL : max. arrays for ipc statistics
ING_TIME

_KSXP_REAPING : tune ksxp layer reaping limit
_KSXP_REPORTING : reporting process for KSXP
_PROCESS

_KSXP_SEND_TIME : set timeout for sends queued with the inter-instance
OUT IPC

_KSXP_SKGXPG_LA : last defined skgxpg parameter – ksxp
ST_PARAMETER

_KSXP_SKGXP_ANT : SKGXP ANT options
_OPTIONS

_KSXP_SKGXP_COM : over-ride default location of lib skgxp compat
PAT_LIBRARY_PAT
H

_KSXP_SKGXP_CTX : IPC debug options flags (RAC)
_FLAGS1

_KSXP_SKGXP_CTX : IPC debug options flags mask (RAC)
_FLAGS1MASK

_KSXP_SKGXP_DYN : IPC protocol override (RAC)
AMIC_PROTOCOL (0/-1=*,2=UDP,3=RDS,!0x1000=ipc_X)

_KSXP_SKGXP_INE : limit SKGXP networks
TS

_KSXP_SKGXP_LIB : over-ride default location of lib skgxp
RARY_PATH

_KSXP_SKGXP_RGN : region socket limits (0xFFFFNNXX): F=flags, N=min,
_PORTS X=max

_KSXP_SKGXP_SPA : ipc ksxp spare parameter 1
RE_PARAM1

_KSXP_SKGXP_SPA : ipc ksxp spare parameter 2
RE_PARAM2

_KSXP_SKGXP_SPA : ipc ksxp spare parameter 3
RE_PARAM3

_KSXP_SKGXP_SPA : ipc ksxp spare parameter 4
RE_PARAM4

_KSXP_SKGXP_SPA : ipc ksxp spare parameter 5
RE_PARAM5

_KSXP_STATS_MEM : limit ipc statistics memory. this parameter is a
_LMT percentage value

_KSXP_TESTING : KSXP test parameter
_KSXP_UNIT_TEST : enable byte transformation unit test
_BYTE_TRANSFORM
ATION

_KSXP_WAIT_FLAG : tune ksxpwait
S

_KTB_DEBUG_FLAG : ktb-layer debug flags
S

_KTC_DEBUG       : for ktc debug
_KTC_LATCHES     : number of ktc latches
_KTILMSC_EXP     : expiration time of ktilm segment cache (in second)
_KTSLJ_SEGEXT_M : segment pre-extension max size in MB (0: unlimited)
AX_MB

_KTSLJ_SEGEXT_R : segment pre-extension retry
ETRY

_KTSLJ_SEGEXT_W : segment pre-extension warning threshold in percentage
ARNING

_KTSLJ_SEGEXT_W : segment pre-extension warning threshold in MB
ARNING_MB

_KTSPSRCH_MAXSC : maximum segments supported by space search cache
_KTSPSRCH_MAXSK : space search cache rejection skip upper limit
IP

_KTSPSRCH_SCCHK : cleanout check time of space search cache
_KTSPSRCH_SCEXP : expiration time of space search cache
_KTST_RSS_MAX : maximum temp extents to be released across instance
_KTST_RSS_MIN : minimum temp extents to be released across instance
_KTST_RSS_RETRY : maximum retries of sort segment release
_KTTEXT_WARNING : tablespace pre-extension warning threshold in
percentage

_KTU_LATCHES : number of KTU latches
_KU_TRACE : datapump trace parameter
_KXDBIO_CTX_INI : initial count of KXDBIO state object
T_COUNT

_KXDBIO_DISABLE : KXDBIO Disable offload for the set opcodes. Value is a
_OFFLOAD_OPCODE     Bitmap of    0x00000001 – disable cell to cell data
copy offload    0x00000002 – disable disk scrubbing
offload to cell    0x00000004 – disable offloaded
writes to cell

_KXDBIO_ENABLE_ : KXDBIO Enable Dumb storage simulation for the set
DS_OPCODE opcodes.

_KXDBIO_HCA_LOA : HCA loadavg threshold at which writes need to get
DAVG_THRESH offloaded

_KXDBIO_UT_CTL : kxdbio unit test controls
_LARGE_POOL_MIN : minimum allocation size in bytes for the large
_ALLOC allocation pool

_LAST_ALLOCATIO : period over which an instance can retain an active
N_PERIOD level1 bitmap

_LATCH_CLASSES   : latch classes override
_LATCH_CLASS_0   : latch class 0
_LATCH_CLASS_1   : latch class 1
_LATCH_CLASS_2   : latch class 2
_LATCH_CLASS_3   : latch class 3
_LATCH_CLASS_4   : latch class 4
_LATCH_CLASS_5   : latch class 5
_LATCH_CLASS_6   : latch class 6
_LATCH_CLASS_7   : latch class 7
_LATCH_MISS_STA : Sid of process for which to collect latch stats
T_SID

_LATCH_WAIT_LIS : Time to sleep on latch wait list until getting priority
T_PRI_SLEEP_SEC
S

_LDR_IO_SIZE : size of write IOs used during a load operation
_LDR_IO_SIZE2 : size of write IOs used during a load operation of EHCC
with HWMB

_LDR_PGA_LIM : pga limit, beyond which new partition loads are delayed
_LDR_TEMPSEG_TH : amount to buffer prior to allocating temp segment
RESHOLD (extent sizing)

_LEFT_NESTED_LO : enable random distribution method for left of
OPS_RANDOM nestedloops

_LGWR_DELAY_WRI : LGWR write delay for debugging
TE

_LGWR_IO_OUTLIE : LGWR I/O outlier frequency
R

_LGWR_IO_SLAVES : LGWR I/O slaves
_LGWR_MAX_NS_WT : Maximum wait time for lgwr to allow NetServer to
progress

_LGWR_NS_NL_MAX : Variable to simulate network latency or buffer
threshold

_LGWR_NS_NL_MIN : Variable to simulate network latency or buffer
threshold

_LGWR_NS_SIM_ER : Variable to simulate errors lgwrns
R

_LGWR_POSTS_FOR : LGWR posts commit waiters for pending broadcasts
_PENDING_BCASTS

_LGWR_TA_SIM_ER : Variable to simulate errors lgwr true async
R

_LIBRARY_CACHE_ : whether KGL advice should be turned on
ADVICE

_LIGHTWEIGHT_HD : Lightweight headers for redo
RS

_LIKE_WITH_BIND : treat LIKE predicate with bind as an equality predicate
_AS_EQUALITY

_LIMIT_ITLS : limit the number of ITLs in OLTP Compressed Tables
_LINUX_PREPAGE_ : prepage large pages during allocation on Linux
LARGE_PAGES

_LMN_COMPRESSIO : suppl logging for compression enabled
N

_LM_ACTIVATE_LM : threshold value to activate an additional lms
S_THRESHOLD

_LM_ASM_ENQ_HAS : if TRUE makes ASM use enqueue master hashing for fusion
HING locks

_LM_BATCH_COMPR : GES threshold to start compression on batch messages
ESSION_THRESHOL
D

_LM_BETTER_DDVI : GES better deadlock victim
CTIM

_LM_BIG_CLUSTER : enable certain big cluster optimizations in drm
_OPTIMIZATIONS

_LM_BROADCAST_R : Enable broadcast of highest held mode of resource.
ES

_LM_BROADCAST_R : Trace string of resource type(s)
ESNAME

_LM_CACHE_ALLOC : ratio of cached over allocated resources
ATED_RES_RATIO

_LM_CACHE_LVL0_ : how often to cleanup level 0 cache res (in sec)
CLEANUP

_LM_CACHE_RES_C : percentage of cached resources should be cleanup
LEANUP

_LM_CACHE_RES_C : max number of batches of cached resources to free per
LEANUP_TRIES cleanup

_LM_CACHE_RES_O : ges resource cache options
PTIONS

_LM_CACHE_RES_S : multiple of iniital res cache below which cleanup is
KIP_CLEANUP skipped

_LM_CACHE_RES_T : cache resource: string of lock types(s)
YPE

_LM_CHECKSUM_BA : GES checksum batch messages
TCH_MSG

_LM_COMM_CHANNE : GES communication channel type
L

_LM_COMM_MSGQ_B : busy wait time in microsecond for msgq
USYWAIT

_LM_COMM_REAP_C : message reap count for receive
OUNT

_LM_COMM_TKTS_A : Ticket allocation addition factor
DD_FACTOR

_LM_COMM_TKTS_C : Weighted average calculation interval length (second)
ALC_PERIOD_LENG
TH

_LM_COMM_TKTS_M : Max number of periods used in weighted avearage
AX_PERIODS calculation

_LM_COMM_TKTS_M : Time to wait before allowing an allocation decrease
IN_DECREASE_WAI
T

_LM_COMM_TKTS_M : Time to wait before allowing an allocation increase
IN_INCREASE_WAI
T

_LM_COMM_TKTS_M : Ticket allocation multiplication factor
ULT_FACTOR

_LM_COMM_TKTS_N : Null request frequency threshold (percentage)
ULLREQ_THRESHOL
D

_LM_COMPRESSION : GES compression scheme
_SCHEME

_LM_CONTIGUOUS_ : number of contiguous blocks that will hash to the same
RES_COUNT HV bucket

_LM_DD_IGNORE_N : if TRUE nodeadlockwait/nodeadlockblock options are
ODD ignored

_LM_DD_INTERVAL : dd time interval in seconds
_LM_DD_MAXDUMP : max number of locks to be dumped during dd validation
_LM_DD_MAX_SEAR : max dd search time per token
CH_TIME

_LM_DD_SCAN_INT : dd scan interval in seconds
ERVAL

_LM_DD_SEARCH_C : number of dd search per token get
NT

_LM_DEFERRED_MS : deferred message timeout
G_TIMEOUT

_LM_DRMOPT12 : enable drm scan optimizations in 12
_LM_DRMOPT12_NO : enable drm latching optimizations in 12
LATCH

_LM_DRM_BATCH_T : time in seconds to wait to batch drm requests
IME

_LM_DRM_DISABLE : disable drm in different level
_LM_DRM_HILOAD_ : drm high load threshold percentage
PERCENTAGE

_LM_DRM_LOWLOAD : drm low load threshold percentage
_PERCENTAGE

_LM_DRM_MAX_REQ : dynamic remastering maximum affinity requests processed
UESTS together

_LM_DRM_MIN_INT : minimum interval in secs between two consecutive drms
ERVAL

_LM_DRM_OBJECT_ : enable/disable object scan to force full table scan
SCAN always

_LM_DRM_WINDOW : dynamic remastering bucket window size
_LM_DRM_XLATCH : dynamic remastering forced exclusive latches
_LM_DUMP_NULL_L : dump null lock in state dump
OCK

_LM_DYNAMIC_LMS : dynamic lms invocation
_LM_DYNAMIC_LOA : dynamic load adjustment
D

_LM_ENABLE_AFF_ : enables affinity benefit computations if TRUE
BENEFIT_STATS

_LM_ENQUEUE_BLO : enqueue blocker dump timeout
CKER_DUMP_TIMEO
UT

_LM_ENQUEUE_BLO : enqueue blocker dump timeout count
CKER_DUMP_TIMEO
UT_CNT

_LM_ENQUEUE_BLO : enqueue blocker kill timeout
CKER_KILL_TIMEO
UT

_LM_ENQUEUE_FRE : Number of enqueue freelist
ELIST

_LM_ENQUEUE_TIM : enqueue suggested min timeout in seconds
EOUT

_LM_ENQ_LOCK_FR : Number of ges enqueue element freelist
EELIST

_LM_ENQ_RCFG : if TRUE enables enqueue reconfiguration
_LM_FDRM_STATS : gather full drm statistics
_LM_FILE_AFFINI : mapping between file id and master instance number
TY

_LM_FILE_READ_M : mapping between read-mostly file id and master instance
OSTLY number

_LM_FREEZE_KILL : timeout for killing unfrozen processes in rcfg/drm
_TIME freeze step

_LM_FREE_QUEUE_ : GES free queue threshold
THRESHOLD

_LM_GLOBAL_POST : if TRUE deliver global posts to remote nodes
S

_LM_HASHTABLE_B : High element threshold in hash table bucket
KT_HIGH

_LM_HASHTABLE_B : Low element threshold in hash table bucket
KT_LOW

_LM_HASHTABLE_B : Threshold for hash table resizing
KT_THR

_LM_HB_ACCEPTAB : list of acceptable hang conditions in heartbeat check
LE_HANG_CONDITI
ON

_LM_HB_CALLSTAC : hb diagnostic call stack collection time in seconds
K_COLLECT_TIME

_LM_HB_DISABLE_ : list of process names to be disabled in heartbeat check
CHECK_LIST

_LM_HB_ENABLE_A : to enable the wait analysis with acceptable condition
CL_CHECK lists

_LM_HB_EXPONENT : heartbeat exponential hang time multiplier
IAL_HANG_TIME_F
ACTOR

_LM_HB_MAXIMUM_ : maximum heartbeat hang report count
HANG_REPORT_COU
NT

_LM_HIGH_LOAD_S : high watermark system load percentage
YSLOAD_PERCENTA
GE

_LM_HIGH_LOAD_T : high load threshold parameter
HRESHOLD

_LM_IDLE_CONNEC : GES idle connection check
TION_CHECK

_LM_IDLE_CONNEC : GES idle connection check interval time
TION_CHECK_INTE
RVAL

_LM_IDLE_CONNEC : GES idle connection instance check callout
TION_INSTANCE_C
HECK_CALLOUT

_LM_IDLE_CONNEC : GES idle connection kill
TION_KILL

_LM_IDLE_CONNEC : GES idle connection max skip kill request
TION_KILL_MAX_S
KIPS

_LM_IDLE_CONNEC : GES maximum idle connection kill request ignore count
TION_MAX_IGNORE
_KILL_COUNT

_LM_IDLE_CONNEC : GES idle connection health quorum threshold
TION_QUORUM_THR
ESHOLD

_LM_KILL_FG_ON_ : GES kill fg on IPC timeout
TIMEOUT

_LM_LHUPD_INTER : load and health update interval
VAL

_LM_LMD_WAITTIM : default wait time for lmd in centiseconds
E

_LM_LMON_NOWAIT : if TRUE makes lmon get nowait latches with timeout loop
_LATCH

_LM_LMS : number of background gcs server processes to start
_LM_LMS_OPT_PRI : enable freeslot lms priority optimization
ORITY

_LM_LMS_PRIORIT : frequency of LMS priority decisions in milliseconds
Y_CHECK_FREQUEN
CY

_LM_LMS_PRIORIT : enable lms priority modification
Y_DYNAMIC

_LM_LMS_RT_THRE : maximum number of real time lms processes on machine
SHOLD

_LM_LMS_SPIN : make lms not sleep
_LM_LMS_WAITTIM : default wait time for lms in centiseconds
E

_LM_LOCAL_HP_EN : use static file affinity for HP enqueue mastership
Q

_LM_LOCKS : number of enqueues configured for cluster database
_LM_LOW_LOAD_PE : low watermark percentage for load threshold
RCENTAGE

_LM_MASTER_WEIG : master resource weight for this instance
HT

_LM_MAX_LMS : max. number of background global cache server processes
_LM_MSG_BATCH_S : GES batch message size
IZE

_LM_MSG_CLEANUP : GES message buffer cleanup interval time
_INTERVAL

_LM_MSG_POOL_DU : GES message pool dump threshold in terms of buffer
MP_THRESHOLD count

_LM_NODE_JOIN_O : cluster database node join optimization in reconfig
PT

_LM_NON_FAULT_T : disable cluster database fault-tolerance mode
OLERANT

_LM_NO_LH_CHECK : skip load and health check at decision points
_LM_NO_SYNC : skip reconfiguration/drm syncr/synca messaging
_LM_NUM_BNFT_ST : number of buckets in the benefit stats hash table
ATS_BUCKETS

_LM_NUM_PT_BUCK : number of buckets in the object affinity hash table
ETS

_LM_NUM_PT_LATC : number of latches in the object affinity hash table
HES

_LM_POSTEVENT_B : postevent buffer size
UFFER_SIZE

_LM_PREREGISTER : enqueue type that requires pre-registration to css
_CSS_RESTYPE

_LM_PROCESS_BAT : GES implicit process batching for IPC messages
CHING

_LM_PROCESS_LOC : limit on scanning process lock queue instead of
K_Q_SCAN_LIMIT resource convert lock queue

_LM_PROCS : number of client processes configured for cluster
database

_LM_PROC_FREEZE : reconfiguration: process freeze timeout
_TIMEOUT

_LM_PSRCFG : enable pseudo reconfiguration
_LM_RAC_SPARE_D : rac parameter dp1
P1

_LM_RAC_SPARE_D : rac parameter dp10
P10

_LM_RAC_SPARE_D : rac parameter dp2
P2

_LM_RAC_SPARE_D : rac parameter dp3
P3

_LM_RAC_SPARE_D : rac parameter dp4
P4

_LM_RAC_SPARE_D : rac parameter dp5
P5

_LM_RAC_SPARE_D : rac parameter dp6
P6

_LM_RAC_SPARE_D : rac parameter dp7
P7

_LM_RAC_SPARE_D : rac parameter dp8
P8

_LM_RAC_SPARE_D : rac parameter dp9
P9

_LM_RAC_SPARE_P : rac parameter p1
1

_LM_RAC_SPARE_P : rac parameter p10
10

_LM_RAC_SPARE_P : rac parameter p2
2

_LM_RAC_SPARE_P : rac parameter p3
3

_LM_RAC_SPARE_P : rac parameter p4
4

_LM_RAC_SPARE_P : rac parameter p5
5

_LM_RAC_SPARE_P : rac parameter p6
6

_LM_RAC_SPARE_P : rac parameter p7
7

_LM_RAC_SPARE_P : rac parameter p8
8

_LM_RAC_SPARE_P : rac parameter p9
9

_LM_RCFG_TIMEOU : dlm reconfiguration timeout
T

_LM_RCVINST : designated instance to do instance recovery
_LM_RCVR_HANG_A : receiver hang allow time in seconds
LLOW_TIME

_LM_RCVR_HANG_C : to kill receiver hang at control file IO
FIO_KILL

_LM_RCVR_HANG_C : receiver hang check frequency in seconds
HECK_FREQUENCY

_LM_RCVR_HANG_C : examine system load when check receiver health
HECK_SYSTEM_LOA
D

_LM_RCVR_HANG_K : to kill receiver hang
ILL

_LM_RCVR_HANG_S : systemstate dump level upon receiver hang
YSTEMSTATE_DUMP
_LEVEL

_LM_RESEND_OPEN : timeout in secs before resubmitting the open-convert
_CONVERT_TIMEOU
T

_LM_RESS : number of resources configured for cluster database
_LM_RES_HASH_BU : number of resource hash buckets
CKET

_LM_RES_PART : number of resource partition configured for gcs
_LM_RES_TM_HASH : number of extra TM resource hash buckets
_BUCKET

_LM_RM_SLAVES : if non zero, it enables remastering slaves
_LM_SENDPROXY_R : GES percentage of send proxy reserve of send tickets
ESERVE

_LM_SEND_MODE : GES send mode
_LM_SEND_QUEUE_ : GES send queue message batching
BATCHING

_LM_SEND_QUEUE_ : GES send queue maximum length
LENGTH

_LM_SHARE_LOCK_ : if TRUE enables share lock optimization
OPT

_LM_SINGLE_INST : enable single instance affinity lock optimization
_AFFINITY_LOCK

_LM_SPARE_THREA : number of spare threads to be created by the GPnP
DS master

_LM_SPARE_UNDO : number of spare undo tablespaces to be created by GPnP
master

_LM_SQ_BATCH_FA : GES send queue minimum batching factor
CTOR

_LM_SQ_BATCH_TY : GES send queue batching mechanism
PE

_LM_SQ_BATCH_WA : GES send queue batching waittime in tick
ITTICK

_LM_SYNC_TIMEOU : Synchronization timeout for DLM reconfiguration steps
T

_LM_TICKETS : GES messaging tickets
_LM_TICKET_ACTI : Flow control ticket active sendback threshold
VE_SENDBACK

_LM_TX_DELTA : TX lock localization delta
_LM_USE_GCR : use GCR module if TRUE
_LM_USE_NEW_DEF : use new defered msg queue timeout action
MSGTMO_ACTION

_LM_USE_TX_TSN : use undo tsn affinity master as TX enqueue master
_LM_VALIDATE_PB : GES process batch validation
ATCH

_LM_WAIT_PENDIN : GES wait on pending send queue
G_SEND_QUEUE

_LM_WATCHPOINT_ : GES number of watchpoints
MAXIMUM

_LM_WATCHPOINT_ : GES maximum time in seconds to keep watchpoint
TIMEOUT

_LM_XIDS : number of transaction IDs configured for cluster
database

_LOAD_WITHOUT_C : Load PL/SQL or Database objects without compilation
OMPILE

_LOCAL_ARC_ASSE : Assert whenever local ORL arch waits for space
RT_ON_WAIT

_LOCAL_COMMUNIC : enable local communication costing when TRUE
ATION_COSTING_E
NABLED

_LOCAL_COMMUNIC : set the ratio between global and local communication
ATION_RATIO (0..100)

_LOCAL_HANG_ANA : the interval at which local hang analysis is run
LYSIS_INTERVAL_
SECS

_LOCK_REF_CONST : number of nowait attempts to lock referential
RAINT_COUNT constraint

_LOCK_SGA_AREAS : Lock specified areas of the SGA in physical memory
_LOGOUT_STORM_R : number of processes that can logout in a second
ATE

_LOGOUT_STORM_R : maximum retry count for logouts
ETRYCNT

_LOGOUT_STORM_T : timeout in centi-seconds for time to wait between
IMEOUT retries

_LOG_ARCHIVE_AV : log archive avoid memcpy
OID_MEMCPY

_LOG_ARCHIVE_BU : Number of buffers to allocate for archiving
FFERS

_LOG_ARCHIVE_CA : archival callout
LLOUT

_LOG_ARCHIVE_NE : Log archive network redo buffer size used by ARCH
TWORK_REDO_SIZE

_LOG_ARCHIVE_PR : log archive protection auto demotion
OT_AUTO_DEMOTE

_LOG_ARCHIVE_ST : log archive security strong auth
RONG_AUTH

_LOG_ARCHIVE_TR : log archive trace pids parameter
ACE_PIDS

_LOG_BLOCKS_DUR : log block images when changed during backup
ING_BACKUP

_LOG_BUFFERS_CO : corrupt redo buffers before write
RRUPT

_LOG_BUFFERS_DE : debug redo buffers (slows things down)
BUG

_LOG_BUFFER_COA : Coalescing log buffers for log writes
LESCE

_LOG_CHECKPOINT : # redo blocks to verify after checkpoint
_RECOVERY_CHECK

_LOG_COMMITTIME : Log commit-time block cleanout
_BLOCK_CLEANOUT

_LOG_DELETION_P : archivelog deletion policy for mandatory/all
OLICY destination

_LOG_EVENT_QUEU : number of the log writer event queues
ES

_LOG_FILE_SYNC_ : Log file sync timeout (centiseconds)
TIMEOUT

_LOG_MAX_OPTIMI : maximum number of threads to which log scan
ZE_THREADS optimization is applied

_LOG_PARALLELIS : Enable dynamic strands
M_DYNAMIC

_LOG_PARALLELIS : Maximum number of log buffer strands
M_MAX

_LOG_PRIVATE_MU : Private strand multiplier for log space preallocation
L

_LOG_PRIVATE_PA : Active sessions multiplier to deduce number of private
RALLELISM_MUL strands

_LOG_READ_BUFFE : Number of log read buffers for media recovery
RS

_LOG_READ_BUFFE : buffer size for reading log files
R_SIZE

_LOG_SIMULTANEO : number of simultaneous copies into redo buffer(# of
US_COPIES copy latches)

_LOG_SPACE_ERRO : should we report space errors to alert log
RS

_LOG_SWITCH_TIM : Maximum number of seconds redos in the current log
EOUT could span

_LOG_UNDO_DF_IN : generate marker to log file# that belong to undo
FO tablespace

_LOG_WRITER_WOR : LGWR worker DLM health-monitoring heartbeat update
KER_DLM_HEARBEA frequency (ms)
T_UPDATE_FREQ

_LOG_WRITE_INFO : Size of log write info array
_SIZE

_LONGOPS_ENABLE : longops stats enabled
D

_LONG_BCAST_ACK : threshold for long bcast ack warning messages in ms
_WARNING_THRESH
OLD

_LONG_LOG_WRITE : threshold for long log write warning messages in ms
_WARNING_THRESH
OLD

_LOWRES_DRIFT_A : allowed lowres timer drift for VKTM
LLOWED_SEC

_LOW_SERVER_THR : low server thresholds
ESHOLD

_LTC_TRACE : tracing level for load table conventional
_LTHREAD_CLEANU : interval for cleaning lightweight threads in secs
P_INTV_SECS

_LTHREAD_CLNUP_ : timeout after hard killing operation for lthread to
HK_WAIT_SECS exit

_LTHREAD_CLNUP_ : wait timeout for PMON between soft kill and hard kill
PMON_SOFTKILL_W of lthreads
AIT_SECS

_LTHREAD_CLNUP_ : timeout for spawner between soft kill and hard kill of
SPAWNER_SK_WAIT lthreads
_SECS

_LTHREAD_DEBUG : Enable Debugging mode for lightweight threads
_LTHREAD_ENABLE : Enable lightweight threads
D

_LTHREAD_MAX_SP : maximum time interval a spawner will wait for a lthread
AWN_TIME_CSECS to get ready

_LTHREAD_SPAWN_ : time interval for a spawner to check for spawnee to get
CHECK_INTV_MS ready

_LTHREAD_STEP_D : Enable Step wise Debugging mode for lightweight threads
EBUGGING

_MAIN_DEAD_PROC : PMON main dead process scan interval (in seconds)
ESS_SCAN_INTERV
AL

_MASTER_DIRECT_ : direct sends for messages from master (DFS)
SENDS

_MAV_REFRESH_CO : refresh materialized views using consistent read
NSISTENT_READ snapshot

_MAV_REFRESH_DO : materialized view MAV refreshes avoid double counting
UBLE_COUNT_PREV
ENTED

_MAV_REFRESH_OP : optimizations during refresh of materialized views
T

_MAV_REFRESH_UN : # tables for union all expansion during materialized
IONALL_TABLES view refresh

_MAX_AQ_PERSIST : max aq persistent queue memory
ENT_QUEUE_MEMOR
Y

_MAX_ASYNC_WAIT : Switchover wait time for async LNS to catch up in
_FOR_CATCH_UP seconds

_MAX_CLIENTS_PE : maximum number of clients per emon
R_EMON

_MAX_CR_ROLLBAC : Maximum number of CR rollbacks per block (LMS)
KS

_MAX_DATA_TRANS : Maximum size of data transfer cache
FER_CACHE_SIZE

_MAX_DEFER_GRAN : Maximum deferred granules transferred by MMAN atonce
_XFER_ATONCE

_MAX_EXPONENTIA : max sleep during exponential backoff
L_SLEEP

_MAX_FILESTAT_T : maximum number of file stat tries
RIES

_MAX_FSU_SEGMEN : Maximum segments to track for fast space usage
TS

_MAX_FSU_STALE_ : Allowed space usage staleness in seconds
TIME

_MAX_INCIDENT_F : Maximum size (in KB, MB, GB, Blocks) of incident dump
ILE_SIZE file

_MAX_IO_SIZE : Maximum I/O size in bytes for sequential file accesses
_MAX_KCNIBR_RAN : Max number of nonlogged data block ranges
GES

_MAX_LARGEPAGE_ : Maximum number of seconds to spend on largepage
ALLOC_TIME_SECS allocation

_MAX_LARGE_IO : IORM:max number of large I/O’s to issue
_MAX_LNS_SHUTDO : Maximum time spent by LNS to archive last log during
WN_ARCHIVAL_TIM shutdown
E

_MAX_LOG_WRITE_ : Maximum I/O parallelism within a log write (auto=0)
IO_PARALLELISM

_MAX_LOG_WRITE_ : Maximum parallelism within a log write (auto=0)
PARALLELISM

_MAX_OUTSTANDIN : Maximum number of outstanding redo log writes
G_LOG_WRITES

_MAX_PENDING_SC : maximum number of pending SCN broadcasts
N_BCASTS

_MAX_PROTOCOL_S : Max occurrence protocols supported in a process
UPPORT

_MAX_QUEUED_REP : Maximum number of report requests that can be queued in
ORT_REQUESTS a list

_MAX_REASONABLE : Max reasonable SCN rate
_SCN_RATE

_MAX_REPORT_FLU : Max no of report requests that can be flushed per cycle
SHES_PERCYCLE

_MAX_RWGS_GROUP : maximum no of groupings on materialized views
INGS

_MAX_SERVICES : maximum number of database services
_MAX_SHRINK_OBJ : number of segments for which shrink stats will be
_STATS maintained

_MAX_SLEEP_HOLD : max time to sleep while holding a latch
ING_LATCH

_MAX_SMALL_IO : IORM:max number of small I/O’s to issue
_MAX_SPACEBG_MS : maximum space management interrupt message throttling
GS_PERCENTAGE

_MAX_SPACEBG_SL : maximum space management background slaves
AVES

_MAX_SPACEBG_TA : maximum space management background tasks
SKS

_MAX_STRING_SIZ : controls error checking for the max_string_size
E_BYPASS parameter

_MAX_SYS_NEXT_E : Dictionary managed SYSTEM tablespace maximum next
XTENT extent size in MB (allowed range [16-4095], 0 if
unlimited)

_MEDIA_RECOVERY : media recovery block read batch
_READ_BATCH

_MEMORY_BROKER_ : memory broker num stat entries
LOG_STAT_ENTRIE
S

_MEMORY_BROKER_ : Marginal Utility threshold pct for bc
MARGINAL_UTILIT
Y_BC

_MEMORY_BROKER_ : Marginal Utility threshold pct for sp
MARGINAL_UTILIT
Y_SP

_MEMORY_BROKER_ : memory broker allow policy to shrink shared pool
SHRINK_HEAPS

_MEMORY_BROKER_ : memory broker allow policy to shrink java pool
SHRINK_JAVA_HEA
PS

_MEMORY_BROKER_ : memory broker allow policy to shrink streams pool
SHRINK_STREAMS_
POOL

_MEMORY_BROKER_ : memory broker policy to timeout shrink shared/java pool
SHRINK_TIMEOUT

_MEMORY_BROKER_ : memory broker statistics gathering interval for auto
STAT_INTERVAL sga

_MEMORY_CHECKIN : check inuse time interval
USE_TIMEINTV

_MEMORY_IMM_MOD : Allow immediate mode without sga/memory target
E_WITHOUT_AUTOS
GA

_MEMORY_INITIAL : Initial default sga target percentage with memory
_SGA_SPLIT_PERC target

_MEMORY_MANAGEM : trace memory management activity
ENT_TRACING

_MEMORY_MAX_TGT : counts the times checker increments memory target
_INC_CNT

_MEMORY_MGMT_FA : always fail immediate mode request
IL_IMMREQ

_MEMORY_MGMT_IM : time in seconds to time out immediate mode request
MREQ_TIMEOUT

_MEMORY_NOCANCE : do not cancel deferred sga reqs with auto-memory
L_DEFSGAREQ

_MEMORY_SANITY_ : partial granule sanity check
CHECK

_MEM_ANNOTATION : private memory annotation collection level
_PR_LEV

_MEM_ANNOTATION : memory annotation pre-allocation scaling
_SCALE

_MEM_ANNOTATION : shared memory annotation collection level
_SH_LEV

_MEM_ANNOTATION : memory annotation in-memory store
_STORE

_MEM_STD_EXTENT : standard extent size for fixed-size-extent heaps
_SIZE

_MESSAGES : message queue resources – dependent on # processes & #
buffers

_MGD_RCV_HANDLE : Managed recovery handle orphan datafile situation
_ORPHAN_DATAFIL
ES

_MIDTIER_AFFINI : cluster wait precentage threshold to enter affinity
TY_CLUSWAIT_PRC
_THRESHOLD

_MIDTIER_AFFINI : goodness gradient threshold to dissolve affinity
TY_GOODNESS_THR
ESHOLD

_MINFREE_PLUS : max percentage of block space + minfree before we mark
block full

_MINIMAL_STATS_ : prohibit stats aggregation at compile/partition
AGGREGATION maintenance time

_MINIMUM_BLOCKS : minimum number freeable blocks for shrink to be present
_TO_SHRINK

_MINIMUM_DB_FLA : Minimum flashback retention
SHBACK_RETENTIO
N

_MINIMUM_EXTENT : minimum number freeable extents for shrink to be
S_TO_SHRINK present

_MIN_TIME_BETWE : minimum time between PSP0 diagnostic used for flow
EN_PSP0_DIAG_SE control
CS

_MIRROR_REDO_BU : Save buffers for debugging redo corruptions
FFERS

_MMV_QUERY_REWR : allow rewrites with multiple MVs and/or base tables
ITE_ENABLED

_MODIFY_COLUMN_ : allow ALTER TABLE MODIFY(column) to violate index key
INDEX_UNUSABLE length limit

_MODULE_ACTION_ : Use module and action old length parameter
OLD_LENGTH

_MPMT_ENABLED : MPMT mode enabled
_MPMT_ENABLED_B : mpmt enabled backgrounds
ACKGROUNDS

_MPMT_FG_ENABLE : MPMT mode foreground enabled
D

_MPMT_PROCS_PER : max procs per osp
_OSP

_MULTIPLE_INSTA : use multiple instances for media recovery
NCE_RECOVERY

_MULTI_INSTANCE : force multi instance parallel recovery
_PMR

_MULTI_JOIN_KEY : TRUE iff multi-join-key table lookup prefetch is
_TABLE_LOOKUP enabled

_MULTI_TRANSACT : reduce SGA memory use during create of a partitioned
ION_OPTIMIZATIO table
N_ENABLED

_MUTEX_SPIN_COU : Mutex spin count
NT

_MUTEX_WAIT_SCH : Mutex wait scheme
EME

_MUTEX_WAIT_TIM : Mutex wait time
E

_MV_ADD_LOG_PLA : add log placeholder
CEHOLDER

_MV_CLEANUP_ORP : cleanup orphaned materialized view metadata
HANED_METADATA

_MV_COMPLETE_RE : use conventional INSERTs for MV complete refresh
FRESH_CONVENTIO
NAL

_MV_DEFERRED_NO : avoid build deferred MV log age validate
_LOG_AGE_VAL

_MV_EXPRESSION_ : MV expression extend size
EXTEND_SIZE

_MV_GENERALIZED : enable/disable new algorithm for MJV with generalized
_OJ_REFRESH_OPT outer joins

_MV_REFRESH_ANA : what percent to analyze after complete/PCT refresh
_MV_REFRESH_COS : refresh decision based on cost or on rules
TING

_MV_REFRESH_DEL : delta mv as fractional percentage of size of mv
TA_FRACTION

_MV_REFRESH_ENH : enable enhanced detection of DML types from MV log
ANCED_DML_DETEC
TION

_MV_REFRESH_EUT : refresh materialized views using EUT(partition)-based
algorithm

_MV_REFRESH_FOR : force materialized view refreshes to use parallel query
CE_PARALLEL_QUE
RY

_MV_REFRESH_INS : materialized view refresh using insert no append
ERT_NO_APPEND

_MV_REFRESH_NEW : materialized view MV refresh new setup disabling
_SETUP_DISABLED

_MV_REFRESH_NO_ : avoid index rebuild as part of the MV refresh
IDX_REBUILD

_MV_REFRESH_PKF : control MV refresh based on the assumption of PK-FK
K_DATA_UNITS_OP data units
T

_MV_REFRESH_PKF : control MV refresh based on the use of PK-FK
K_RELATIONSHIP_ relationships
OPT

_MV_REFRESH_REB : minimum percentage change required in MV to force an
UILD_PERCENTAGE indexrebuild

_MV_REFRESH_SEL : create materialized views with selections and fast
ECTIONS refresh

_MV_REFRESH_UPD : materialized view refresh using update analysis
ATE_ANALYSIS

_MV_REFRESH_USE : use hash_sj hint in queries
_HASH_SJ

_MV_REFRESH_USE : use no_merge hint in queries
_NO_MERGE

_MV_REFRESH_USE : pass cardinality hints to refresh queries
_STATS

_MV_REFSCHED_TI : proportionality constant for dop vs. time in MV refresh
MEINCR

_MV_ROLLING_INV : create/alter mv uses rolling cursor invalidation
instead of immediate

_MWIN_SCHEDULE : Enable/disable Maintenance Window Schedules
_NAMESERVICE_CO : NameService Consistency check switch
NSISTENCY_CHECK

_NCHAR_IMP_CNV : NLS allow Implicit Conversion between CHAR and NCHAR
_NCHAR_IMP_CONV : should implicit conversion bewteen clob and nclob be
allowed

_NCMB_READAHEAD : enable multi-block readahead for an index scan
_ENABLED

_NCMB_READAHEAD : turn on multi-block readahead tracing
_TRACING

_NCOMP_SHARED_O : native compilation shared objects dir
BJECTS_DIR

_NESTED_LOOP_FU : nested loop fudge
DGE

_NESTED_MV_FAST : nested MV refresh fast on commit allowed
_ONCOMMIT_ENABL
ED

_NET_TIMEOUT_LA : NET_TIMEOUT latency
TENCY

_NEWSORT_ENABLE : controls whether new sorts can be used as system sort
D

_NEWSORT_ORDERE : controls when new sort avoids sorting ordered input
D_PCT

_NEWSORT_TYPE : specifies options for the new sort algorithm
_NEW_INITIAL_JO : enable initial join orders based on new ordering
IN_ORDERS heuristics

_NEW_SORT_COST_ : enables the use of new cost estimate for sort
ESTIMATE

_NINETEENTH_SPA : nineteenth spare parameter – string
RE_PARAMETER

_NINTH_SPARE_PA : ninth spare parameter – integer
RAMETER

_NLJ_BATCHING_A : FAE flag type set after restoring to IO batching buffer
E_FLAG

_NLJ_BATCHING_E : enable batching of the RHS IO in NLJ
NABLED

_NLJ_BATCHING_M : enable exceptions for buffer cache misses
ISSES_ENABLED

_NLS_PARAMETER_ : enables or disables updates to v$parameter whenever an
SYNC_ENABLED alter session statement modifies various nls parameters

_NOLOGGING_KCNB : Number of nologging buffer hash buckets
UF_HASH_BUCKETS

_NOLOGGING_KCNB : Number of nologging buffer hash latches
UF_HASH_LATCHES

_NOLOGGING_LOAD : Nologging standby: direct load buffer size
_SLOTSZ

_NOLOGGING_SDCL : Nologging standby append sdcl wait time
_APPEND_WAIT

_NOLOGGING_SEND : Nologging standby: outstanding send buffer ratio
BUF_RATIO

_NOLOGGING_TXN_ : Nologging standby transaction commit wait time
CMT_WAIT

_NONCDB_TO_PDB : converting a non-cdb to a pdb
_NOSEG_FOR_UNUS : no segments for unusable indexes if set to TRUE
ABLE_INDEX_ENAB
LED

_NOTIFY_CRS : notify cluster ready services of startup and shutdown
_NO_OBJECTS : no object features are used
_NO_OR_EXPANSIO : OR expansion during optimization disabled
N

_NO_RECOVERY_TH : no recovery through this resetlogs operation
ROUGH_RESETLOGS

_NO_SMALL_FILE : Not to apply new extent scheme for small file temp
spaces

_NO_STALE_JOINB : No joinbacks if mv is stale
ACK_REWRITE

_NS_MAX_FLUSH_W : Flush wait time for NetServer to flush oustanding
T writes

_NS_MAX_SEND_DE : Data Loss Time Bound for NetServer
LAY

_NUMA_BUFFER_CA : Configure NUMA buffer cache stats
CHE_STATS

_NUMA_INSTANCE_ : Set of nodes that this instance should run on
MAPPING

_NUMA_POOL_SIZE : aggregate size in bytes of NUMA pool
_NUMA_SHIFT_ENA : Enable NUMA shift
BLED

_NUMA_SHIFT_VAL : user defined value for numa nodes shift
UE

_NUMA_TRACE_LEV : numa trace event
EL

_NUMBER_CACHED_ : maximum number of cached attributes per instance
ATTRIBUTES

_NUMBER_CACHED_ : maximum number of cached group memberships
GROUP_MEMBERSHI
PS

_NUMBER_GROUP_M : maximum number of group memberships per cache line
EMBERSHIPS_PER_
CACHE_LINE

_NUM_LONGOP_CHI : number of child latches for long op array
LD_LATCHES

_OBJECT_NUMBER_ : Object number cache size
CACHE_SIZE

_OBJECT_REUSE_B : if 1 or higher, handle object reuse
AST

_OBJECT_STATIST : enable the object level statistics collection
ICS

_OBJECT_STATS_M : Maximum number of entries to be tracked per stat
AX_ENTRIES

_OBJ_CKPT_TRACI : Enable object checkpoint tracing
NG

_ODCI_AGGREGATE : trade speed for space in user-defined aggregation
_SAVE_SPACE

_OFFLINE_ROLLBA : offline undo segment list
CK_SEGMENTS

_OGMS_HOME : GMS home directory
_OLAPI_HISTORY_ : enable olapi history retention
RETENTION

_OLAPI_IFACE_OB : enable olapi interface object history collection
JECT_HISTORY

_OLAPI_IFACE_OB : enable olapi interface object history retention
JECT_HISTORY_RE
TENTION

_OLAPI_IFACE_OP : enable olapi interface operation history retention
ERATION_HISTORY
_RETENTION

_OLAPI_INTERFAC : enable olapi interface operation history collection
E_OPERATION_HIS
TORY

_OLAPI_MEMORY_O : enable olapi memory alloc/free history collection
PERATION_HISTOR
Y

_OLAPI_MEMORY_O : enable olapi memory alloc/free history collection
PERATION_HISTOR pausing
Y_PAUSE_AT_SEQN
O

_OLAPI_MEMORY_O : enable olapi memory operation history retention
PERATION_HISTOR
Y_RETENTION

_OLAPI_SESSION_ : enable olapi session history collection
HISTORY

_OLAPI_SESSION_ : enable olapi session history retention
HISTORY_RETENTI
ON

_OLAP_ADV_COMP_ : do additional predicate stats analysis for AW rowsource
STATS_CC_PRECOM
P

_OLAP_ADV_COMP_ : do additional predicate stats analysis for AW rowsource
STATS_MAX_ROWS

_OLAP_AGGREGATE : OLAP Aggregate max buffer size
_BUFFER_SIZE

_OLAP_AGGREGATE : OLAP Aggregate debug flags
_FLAGS

_OLAP_AGGREGATE : OLAP Aggregate function cache enabler
_FUNCTION_CACHE
_ENABLED

_OLAP_AGGREGATE : OLAP Aggregate max thread tuples creation
_MAX_THREAD_TUP
LES

_OLAP_AGGREGATE : OLAP Aggregate min buffer size
_MIN_BUFFER_SIZ
E

_OLAP_AGGREGATE : OLAP Aggregate minimum cardinality of dimensions for
_MIN_THREAD_STA thread
TUS

_OLAP_AGGREGATE : OLAP Aggregate Multi-path Hierarhies enabled
_MULTIPATH_HIER

_OLAP_AGGREGATE : OLAP Aggregate status array usage threshold
_STATLEN_THRESH

_OLAP_AGGREGATE : OLAP Aggregate max worklists generated at once
_WORKLIST_MAX

_OLAP_AGGREGATE : OLAP Aggregate max work parents
_WORK_PER_THREA
D

_OLAP_ALLOCATE_ : OLAP Allocate Errorlog Format
ERRORLOG_FORMAT

_OLAP_ALLOCATE_ : OLAP Allocate Errorlog Header format
ERRORLOG_HEADER

_OLAP_ANALYZE_M : OLAP DML ANALYZE command max cells to analyze
AX

_OLAP_CONTINUOU : OLAP logging definition
S_TRACE_FILE

_OLAP_DBGOUTFIL : OLAP DbgOutfile copy output to event log (tracefile)
E_ECHO_TO_EVENT
LOG

_OLAP_DIMENSION : OLAP Dimension In-Core Hash Table Force
_COREHASH_FORCE

_OLAP_DIMENSION : OLAP Dimension In-Core Hash Table Large Threshold
_COREHASH_LARGE

_OLAP_DIMENSION : OLAP Dimension In-Core Hash Table Pressure Threshold
_COREHASH_PRESS
URE

_OLAP_DIMENSION : OLAP Dimension In-Core Hash Table Maximum Memory Use
_COREHASH_SIZE

_OLAP_EIF_EXPOR : OLAP EIF Export BLOB size
T_LOB_SIZE

_OLAP_LMGEN_DIM : Limitmap generator dimension column size
_SIZE

_OLAP_LMGEN_MEA : Limitmap generator measure column size
S_SIZE

_OLAP_OBJECT_HA : OLAP Object Hash Table Class
SH_CLASS

_OLAP_PAGE_POOL : OLAP Page Pool Expand Rate
_EXPAND_RATE

_OLAP_PAGE_POOL : OLAP Page Pool High Watermark
_HI

_OLAP_PAGE_POOL : OLAP Page Pool Hit Target
_HIT_TARGET

_OLAP_PAGE_POOL : OLAP Page Pool Low Watermark
_LOW

_OLAP_PAGE_POOL : OLAP Page Pool Pressure Threshold
_PRESSURE

_OLAP_PAGE_POOL : OLAP Page Pool Shrink Rate
_SHRINK_RATE

_OLAP_PARALLEL_ : OLAP parallel update server count
UPDATE_SERVER_N
UM

_OLAP_PARALLEL_ : OLAP parallel update threshold for number of small
UPDATE_SMALL_TH pagespaces
RESHOLD

_OLAP_PARALLEL_ : OLAP parallel update threshold in pages
UPDATE_THRESHOL
D

_OLAP_ROW_LOAD_ : OLAP Row Load Time Precision
TIME_PRECISION

_OLAP_SESSCACHE : OLAP Session Cache knob
_ENABLED

_OLAP_SORT_BUFF : OLAP Sort Buffer Size Percentage
ER_PCT

_OLAP_SORT_BUFF : OLAP Sort Buffer Size
ER_SIZE

_OLAP_STATBOOL_ : OLAP Status Boolean max incore bits
COREBITS

_OLAP_STATBOOL_ : OLAP Status Boolean CBM threshold
THRESHOLD

_OLAP_TABLE_FUN : Specify TRUE to output OLAP table function timed
CTION_STATISTIC statistics trace
S

_OLAP_WRAP_ERRO : Wrap error messages to OLAP outfile
RS

_OLD_CONNECT_BY : enable/disable old connect by
_ENABLED

_OLD_EXTENT_SCH : Revert to old extent allocation
EME

_OLS_CLEANUP_TA : Clean up unnecessary entries in OLS sessinfo table
SK

_OLTP_COMPRESSI : oltp compression enabled
ON

_OLTP_COMPRESSI : oltp compression gain
ON_GAIN

_OLTP_COMP_DBG_ : oltp compression scan debug
SCAN

_OLTP_SPILL : spill rows for oltp compression if loader pga limit is
exceeded

_OMF : enable/disable OMF
_OMNI_ENQUEUE_E : Enable Omni Enqueue feature (0 = disable, 1 = enable on
NABLE ASM (default), 2 = enable)

_ONESIDE_COLSTA : sanity check on default selectivity for like/range
T_FOR_EQUIJOINS predicate

_ONLINE_CTAS_DI : controls dumping diagnostic information for online ctas
AG

_ONLINE_PATCH_D : disable check for function on stack for online patches
ISABLE_STACK_CH
ECK

_OPS_PER_SEMOP : the exact number of operations per semop system call
_OPTIMIZER_ADAP : optimizer adaptive cursor sharing
TIVE_CURSOR_SHA
RING

_OPTIMIZER_ADAP : enable adaptive plans
TIVE_PLANS

_OPTIMIZER_ADAP : internal controls for adaptive plans
TIVE_PLAN_CONTR
OL

_OPTIMIZER_ADJU : adjust selectivity for null values
ST_FOR_NULLS

_OPTIMIZER_ADS_ : maximum number of tables in a join under ADS
MAX_TABLE_COUNT

_OPTIMIZER_ADS_ : maximum time limit (seconds) under ADS
TIME_LIMIT

_OPTIMIZER_ADS_ : use result cache for ADS queries
USE_RESULT_CACH
E

_OPTIMIZER_ANSI : optimization of left/full ansi-joins and lateral views
_JOIN_LATERAL_E
NHANCE

_OPTIMIZER_ANSI : re-architecture of ANSI left, right, and full outer
_REARCHITECTURE joins

_OPTIMIZER_AUTO : enable/disable auto stats collection job
STATS_JOB

_OPTIMIZER_AW_J : Enables AW Join Push optimization
OIN_PUSH_ENABLE
D

_OPTIMIZER_AW_S : Enables statistcs on AW olap_table table function
TATS_ENABLED

_OPTIMIZER_BATC : enable table access by ROWID IO batching
H_TABLE_ACCESS_
BY_ROWID

_OPTIMIZER_BETT : enable improved costing of index access using
ER_INLIST_COSTI in-list(s)
NG

_OPTIMIZER_BLOC : standard block size used by optimizer
K_SIZE

_OPTIMIZER_CACH : cost with cache statistics
E_STATS

_OPTIMIZER_CART : optimizer cartesian join enabled
ESIAN_ENABLED

_OPTIMIZER_CBQT : cost factor for cost-based query transformation
_FACTOR

_OPTIMIZER_CBQT : disable cost based transformation query size
_NO_SIZE_RESTRI restriction
CTION

_OPTIMIZER_CEIL : CEIL cost in CBO
_COST

_OPTIMIZER_CLUS : enable/disable the cluster by rowid feature
TER_BY_ROWID

_OPTIMIZER_CLUS : internal control for cluster by rowid feature mode
TER_BY_ROWID_CO
NTROL

_OPTIMIZER_COAL : consider coalescing of subqueries optimization
ESCE_SUBQUERIES

_OPTIMIZER_COMP : enable selectivity estimation for builtin functions
LEX_PRED_SELECT
IVITY

_OPTIMIZER_COMP : force index stats collection on index creation/rebuild
UTE_INDEX_STATS

_OPTIMIZER_CONN : use cost-based transformation for whr clause in connect
ECT_BY_CB_WHR_O by
NLY

_OPTIMIZER_CONN : combine no filtering connect by and start with
ECT_BY_COMBINE_
SW

_OPTIMIZER_CONN : use cost-based transformation for connect by
ECT_BY_COST_BAS
ED

_OPTIMIZER_CONN : allow connect by to eliminate duplicates from input
ECT_BY_ELIM_DUP
S

_OPTIMIZER_CORR : force correct computation of subquery selectivity
ECT_SQ_SELECTIV
ITY

_OPTIMIZER_COST : enables cost-based query transformation
_BASED_TRANSFOR
MATION

_OPTIMIZER_COST : enables costing of filter predicates in IO cost model
_FILTER_PRED

_OPTIMIZER_COST : add cost of generating result set when #rows per key >
_HJSMJ_MULTIMAT 1
CH

_OPTIMIZER_COST : optimizer cost model
_MODEL

_OPTIMIZER_CUBE : enable cube join
_JOIN_ENABLED

_OPTIMIZER_DEGR : force the optimizer to use the same degree of
EE parallelism

_OPTIMIZER_DIM_ : use join selectivity in choosing star transformation
SUBQ_JOIN_SEL dimensions

_OPTIMIZER_DISA : disable star transformation sanity checks
BLE_STRANS_SANI
TY_CHECKS

_OPTIMIZER_DIST : Transforms Distinct Aggregates to non-distinct
INCT_AGG_TRANSF aggregates
ORM

_OPTIMIZER_DIST : Eliminates redundant SELECT DISTNCT’s
INCT_ELIMINATIO
N

_OPTIMIZER_DIST : consider distinct placement optimization
INCT_PLACEMENT

_OPTIMIZER_DSDI : controls optimizer usage of dynamic sampling directives
R_USAGE_CONTROL

_OPTIMIZER_DYN_ : number of blocks for optimizer dynamic sampling
SMP_BLKS

_OPTIMIZER_ELIM : optimizer filtering join elimination enabled
INATE_FILTERING
_JOIN

_OPTIMIZER_ENAB : use improved density computation for selectivity
LE_DENSITY_IMPR estimation
OVEMENTS

_OPTIMIZER_ENAB : use extended statistics for selectivity estimation
LE_EXTENDED_STA
TS

_OPTIMIZER_ENAB : consider table lookup by nl transformation
LE_TABLE_LOOKUP
_BY_NL

_OPTIMIZER_ENHA : push filters before trying cost-based query
NCED_FILTER_PUS transformation
H

_OPTIMIZER_EXTE : optimizer extended cursor sharing
NDED_CURSOR_SHA
RING

_OPTIMIZER_EXTE : optimizer extended cursor sharing for relational
NDED_CURSOR_SHA operators
RING_REL

_OPTIMIZER_EXTE : controls the optimizer usage of extended stats
NDED_STATS_USAG
E_CONTROL

_OPTIMIZER_EXTE : join pred pushdown on group-by, distinct,
ND_JPPD_VIEW_TY semi-/anti-joined view
PES

_OPTIMIZER_FALS : optimizer false predicate pull up transformation
E_FILTER_PRED_P
ULLUP

_OPTIMIZER_FAST : use fast algorithm to traverse predicates for physical
_ACCESS_PRED_AN optimizer
ALYSIS

_OPTIMIZER_FAST : use fast algorithm to generate transitive predicates
_PRED_TRANSITIV
ITY

_OPTIMIZER_FEED : controls the optimizer feedback framework
BACK_CONTROL

_OPTIMIZER_FILT : use cost-based flter predicate pull up transformation
ER_PRED_PULLUP

_OPTIMIZER_FILT : enable/disable filter predicate pushdown
ER_PUSHDOWN

_OPTIMIZER_FKR_ : Optimizer index bias over FTS/IFFS under first K rows
INDEX_COST_BIAS mode

_OPTIMIZER_FORC : force CBQT transformation regardless of cost
E_CBQT

_OPTIMIZER_FREE : free transformation subheap after each transformation
_TRANSFORMATION
_HEAP

_OPTIMIZER_FULL : enable/disable full outer to left outer join conversion
_OUTER_JOIN_TO_
OUTER

_OPTIMIZER_GATH : optimizer gather feedback
ER_FEEDBACK

_OPTIMIZER_GATH : enable/disable online statistics gathering
ER_STATS_ON_LOA
D

_OPTIMIZER_GENE : optimizer generate transitive predicates
RATE_TRANSITIVE
_PRED

_OPTIMIZER_GROU : consider group-by placement optimization
P_BY_PLACEMENT

_OPTIMIZER_HYBR : enable hybrid full partition-wise join when TRUE
ID_FPWJ_ENABLED

_OPTIMIZER_IGNO : enables the embedded hints to be ignored
RE_HINTS

_OPTIMIZER_IMPR : improve table and partial overlap join selectivity
OVE_SELECTIVITY computation

_OPTIMIZER_INST : force the optimizer to use the specified number of
ANCE_COUNT instances

_OPTIMIZER_INTE : interleave join predicate pushdown during CBQT
RLEAVE_JPPD

_OPTIMIZER_INVA : time window for invalidation of cursors of analyzed
LIDATION_PERIOD objects

_OPTIMIZER_JOIN : optimizer join elimination enabled
_ELIMINATION_EN
ABLED

_OPTIMIZER_JOIN : use join factorization transformation
_FACTORIZATION

_OPTIMIZER_JOIN : controls the optimizer join order search algorithm
_ORDER_CONTROL

_OPTIMIZER_JOIN : enable/disable sanity check for multi-column join
_SEL_SANITY_CHE selectivity
CK

_OPTIMIZER_MAX_ : optimizer maximum join permutations per query block
PERMUTATIONS

_OPTIMIZER_MIN_ : set minimum cached blocks
CACHE_BLOCKS

_OPTIMIZER_MJC_ : enable merge join cartesian
ENABLED

_OPTIMIZER_MODE : force setting of optimizer mode for user recursive SQL
_FORCE also

_OPTIMIZER_MULT : generate and run plans using several compilation
IPLE_CENV environments

_OPTIMIZER_MULT : control what to report in trace file when run in
IPLE_CENV_REPOR multi-plan mode
T

_OPTIMIZER_MULT : control the types of statements that are run in
IPLE_CENV_STMT multi-plan mode

_OPTIMIZER_MULT : consider join-predicate pushdown that requires
I_LEVEL_PUSH_PR multi-level pushdown to base table
ED

_OPTIMIZER_MULT : allows multiple tables on the left of outerjoin
I_TABLE_OUTERJO
IN

_OPTIMIZER_NATI : execute full outer join using native implementaion
VE_FULL_OUTER_J
OIN

_OPTIMIZER_NEST : number of groups above which we use nested rollup exec
ED_ROLLUP_FOR_G for gset
SET

_OPTIMIZER_NEW_ : compute join cardinality using non-rounded input values
JOIN_CARD_COMPU
TATION

_OPTIMIZER_NULL : enables null-accepting semijoin
_ACCEPTING_SEMI
JOIN

_OPTIMIZER_NULL : null-aware antijoin parameter
_AWARE_ANTIJOIN

_OPTIMIZER_ORDE : Eliminates order bys from views before query
R_BY_ELIMINATIO transformation
N_ENABLED

_OPTIMIZER_OR_E : control or expansion approach used
XPANSION

_OPTIMIZER_OR_E : Use subheap for optimizer or-expansion
XPANSION_SUBHEA
P

_OPTIMIZER_OUTE : enable/disable outer to inner join conversion
R_JOIN_TO_INNER

_OPTIMIZER_OUTE : Enable transformation of outer-join to anti-join if
R_TO_ANTI_ENABL possible
ED

_OPTIMIZER_PART : partial join evaluation parameter
IAL_JOIN_EVAL

_OPTIMIZER_PERC : optimizer percent parallel
ENT_PARALLEL

_OPTIMIZER_PERF : controls the performance feedback
ORMANCE_FEEDBAC
K

_OPTIMIZER_PROC : control the level of processing rates
_RATE_LEVEL

_OPTIMIZER_PROC : control the source of processing rates
_RATE_SOURCE

_OPTIMIZER_PURG : number of rows to be deleted at each iteration of the
E_STATS_ITERATI stats purging process
ON_ROW_COUNT

_OPTIMIZER_PUSH : push down distinct from query block to table
_DOWN_DISTINCT

_OPTIMIZER_PUSH : use cost-based query transformation for push pred
_PRED_COST_BASE optimization
D

_OPTIMIZER_RAND : optimizer seed value for random plans
OM_PLAN

_OPTIMIZER_REUS : reuse cost annotations during cost-based query
E_COST_ANNOTATI transformation
ONS

_OPTIMIZER_ROWN : Default value to use for rownum bind
UM_BIND_DEFAULT

_OPTIMIZER_ROWN : enable the use of first K rows due to rownum predicate
UM_PRED_BASED_F
KR

_OPTIMIZER_SAVE : enable/disable saving old versions of optimizer stats
_STATS

_OPTIMIZER_SEAR : optimizer search limit
CH_LIMIT

_OPTIMIZER_SELF : account for self-induced caching
_INDUCED_CACHE_
COST

_OPTIMIZER_SKIP : enable/disable index skip scan
_SCAN_ENABLED

_OPTIMIZER_SKIP : consider index skip scan for predicates with guessed
_SCAN_GUESS selectivity

_OPTIMIZER_SORT : enable/disable sort-merge join method
MERGE_JOIN_ENAB
LED

_OPTIMIZER_SORT : enable/disable sort-merge join using inequality
MERGE_JOIN_INEQ predicates
UALITY

_OPTIMIZER_SQU_ : enables unnesting of subquery in a bottom-up manner
BOTTOMUP

_OPTIMIZER_STAR : optimizer star plan enabled
PLAN_ENABLED

_OPTIMIZER_STAR : optimizer star transformation minimum cost
_TRANS_MIN_COST

_OPTIMIZER_STAR : optimizer star transformation minimum ratio
_TRANS_MIN_RATI
O

_OPTIMIZER_STAR : enable/disable star transformation in with clause
_TRAN_IN_WITH_C queries
LAUSE

_OPTIMIZER_STRA : allow adaptive pruning of star transformation bitmap
NS_ADAPTIVE_PRU trees
NING

_OPTIMIZER_SYST : system statistics usage
EM_STATS_USAGE

_OPTIMIZER_TABL : consider table expansion transformation
E_EXPANSION

_OPTIMIZER_TRAC : optimizer trace parameter
E

_OPTIMIZER_TRAN : retain equi-join pred upon transitive equality pred
SITIVITY_RETAIN generation

_OPTIMIZER_TRY_ : try Star Transformation before Join Predicate Push Down
ST_BEFORE_JPPD

_OPTIMIZER_UNDO : undo changes to query optimizer
_CHANGES

_OPTIMIZER_UNDO : optimizer undo cost change
_COST_CHANGE

_OPTIMIZER_UNNE : enables unnesting of every type of subquery
ST_ALL_SUBQUERI
ES

_OPTIMIZER_UNNE : Unnesting of correlated set subqueries (TRUE/FALSE)
ST_CORR_SET_SUB
Q

_OPTIMIZER_UNNE : Unnesting of disjunctive subqueries (TRUE/FALSE)
ST_DISJUNCTIVE_
SUBQ

_OPTIMIZER_UNNE : enables unnesting of of scalar subquery
ST_SCALAR_SQ

_OPTIMIZER_USE_ : use rewritten star transformation using cbqt framework
CBQT_STAR_TRANS
FORMATION

_OPTIMIZER_USE_ : optimizer use feedback
FEEDBACK

_OPTIMIZER_USE_ : use GTT session private statistics
GTT_SESSION_STA
TS

_OPTIMIZER_USE_ : enable/disable the usage of histograms by the optimizer
HISTOGRAMS

_OPTIMIZER_USE_ : Enables physical optimizer subheap
SUBHEAP

_OPTIM_ADJUST_F : adjust stats for skews across partitions
OR_PART_SKEWS

_OPTIM_DICT_STA : enable/disable dictionary stats gathering at db
TS_AT_DB_CR_UPG create/upgrade

_OPTIM_ENHANCE_ : TRUE to enable index [fast] full scan more often
NNULL_DETECTION

_OPTIM_NEW_DEFA : improves the way default equijoin selectivity are
ULT_JOIN_SEL computed

_OPTIM_PEEK_USE : enable peeking of user binds
R_BINDS

_ORACLE_SCRIPT : Running an Oracle-supplied script
_ORADBG_PATHNAM : path of oradbg script
E

_ORADEBUG_CMDS_ : oradebug commands to execute at instance startup
AT_STARTUP

_ORADEBUG_FORCE : force target processes to execute oradebug commands?
_ORDERED_NESTED : enable ordered nested loop costing
_LOOP

_ORDERED_SEMIJO : enable ordered semi-join subquery
IN

_ORPH_CLN_INTER : qmon periodic interval for removed subscriber messages
VAL cleanup

_OR_EXPAND_NVL_ : enable OR expanded plan for NVL/DECODE predicate
PREDICATE

_OSS_SKGXP_UDP_ : OSSLIB enable[!0]/disable[0] dynamic credit mgmt for
DYNAMIC_CREDIT_ SKGXP-UDP
MGMT

_OS_SCHED_HIGH_ : OS high priority level
PRIORITY

_OTHER_WAIT_EVE : exclude event names from _other_wait_threshold
NT_EXCLUSION calculations

_OTHER_WAIT_THR : threshold wait percentage for event wait class Other
ESHOLD

_OUTLINE_BITMAP : BITMAP_TREE hint enabled in outline
_TREE

_PARALLELISM_CO : set the parallelism cost fudge factor
ST_FUDGE_FACTOR

_PARALLEL_ADAPT : maximum number of users running with default DOP
IVE_MAX_USERS

_PARALLEL_BLACK : parallel execution blackbox enabled
BOX_ENABLED

_PARALLEL_BLACK : true if blackbox will be allocated in SGA, false if PGA
BOX_SGA

_PARALLEL_BLACK : parallel execution blackbox bucket size
BOX_SIZE

_PARALLEL_BROAD : enable broadcasting of small inputs to hash and sort
CAST_ENABLED merge joins

_PARALLEL_CLUST : max percentage of the global buffer cache to use for
ER_CACHE_PCT affinity

_PARALLEL_CLUST : policy used for parallel execution on
ER_CACHE_POLICY cluster(ADAPTIVE/CACHED)

_PARALLEL_CONSE : conservative parallel statement queuing
RVATIVE_QUEUING

_PARALLEL_CTAS_ : enable/disable parallel CTAS operation
ENABLED

_PARALLEL_DEFAU : default maximum number of instances for parallel query
LT_MAX_INSTANCE
S

_PARALLEL_EXECU : Alignment of PX buffers to OS page boundary
TION_MESSAGE_AL
IGN

_PARALLEL_FAKE_ : fake db-scheduler percent used for testing
CLASS_PCT

_PARALLEL_FAULT : total number of faults fault-tolerance will handle
_TOLERANCE_THRE
SHOLD

_PARALLEL_FIXWR : Number of buckets for each round of fix write
ITE_BUCKET

_PARALLEL_HEART : interval of snapshot to track px msging between
BEAT_SNAPSHOT_I instances
NTERVAL

_PARALLEL_HEART : maximum number of historical snapshots archived
BEAT_SNAPSHOT_M
AX

_PARALLEL_LOAD_ : parallel execution load balanced slave allocation
BALANCING

_PARALLEL_LOAD_ : number of threads to allocate per instance
BAL_UNIT

_PARALLEL_LOAD_ : diffrence in percentage controlling px load propagation
PUBLISH_THRESHO
LD

_PARALLEL_MIN_M : minimum size of shared pool memory to reserve for pq
ESSAGE_POOL servers

_PARALLEL_OPTIM : parallel optimization phase when all slaves are local
IZATION_PHASE_F
OR_LOCAL

_PARALLEL_QUEUI : parallel statement queuing: max waiting time in queue
NG_MAX_WAITINGT
IME

_PARALLEL_RECOV : stop at -position- to step through SMON
ERY_STOPAT

_PARALLEL_REPLA : Number of messages for each round of parallel replay
Y_MSG_LIMIT

_PARALLEL_SCALA : Parallel scalability criterion for parallel execution
BILITY

_PARALLEL_SERVE : idle time before parallel query server dies (in 1/100
R_IDLE_TIME sec)

_PARALLEL_SERVE : sleep time between dequeue timeouts (in 1/100ths)
R_SLEEP_TIME

_PARALLEL_SLAVE : time(in seconds) to wait before retrying slave
_ACQUISITION_WA acquisition
IT

_PARALLEL_STATE : parallel statement queuing enabled
MENT_QUEUING

_PARALLEL_SYSPL : TRUE to obey force parallel query/dml/ddl under System
S_OBEY_FORCE PL/SQL

_PARALLEL_TIME_ : unit of work used to derive the degree of parallelism
UNIT (in seconds)

_PARALLEL_TXN_G : enable parallel_txn hint with updates and deletes
LOBAL

_PARAMETER_TABL : parameter table block size
E_BLOCK_SIZE

_PARTIAL_PWISE_ : enable partial partition-wise join when TRUE
JOIN_ENABLED

_PARTITION_ADVI : enables sampling based partitioning validation
SOR_SRS_ACTIVE

_PARTITION_CDB_ : partitioned cdb view evaluation enabled
VIEW_ENABLED

_PARTITION_LARG : Enables large extent allocation for partitioned tables
E_EXTENTS

_PARTITION_VIEW : enable/disable partitioned views
_ENABLED

_PART_ACCESS_VE : use version numbers to access versioned objects for
RSION_BY_NUMBER partitioning

_PART_REDEF_GLO : online partition redefinition update global indexes
BAL_INDEX_UPDAT
E

_PASSWORDFILE_E : password file enqueue timeout in seconds
NQUEUE_TIMEOUT

_PCT_REFRESH_DO : materialized view PCT refreshes avoid double counting
UBLE_COUNT_PREV
ENTED

_PDB_USE_SEQUEN : Use sequence cache in PDB mode
CE_CACHE

_PDML_GIM_SAMPL : control separation of global index maintenance for PDML
ING

_PDML_GIM_STAGG : slaves start on different index when doing index maint
ERED

_PDML_SLAVES_DI : slaves start on different partition when doing index
FF_PART maint

_PERCENT_FLASHB : Percent of flashback buffer filled to be considered
ACK_BUF_PARTIAL partial full
_FULL

_PGACTX_CAP_STA : capture stacks for setting pgactx
CKS

_PGA_LARGE_EXTE : PGA large extent size
NT_SIZE

_PGA_LIMIT_CHEC : microseconds to wait for over limit confirmation
K_WAIT_TIME

_PGA_LIMIT_DUMP : dump PGA summary when signalling ORA-4036
_SUMMARY

_PGA_LIMIT_INTE : whether to interrupt smaller eligible processes
RRUPT_SMALLER

_PGA_LIMIT_MIN_ : bytes of PGA usage below which process will not get
REQ_SIZE ORA-4036

_PGA_LIMIT_SIMU : bytes of physical memory to determine
LATED_PHYSMEM_S pga_aggregate_limit with
IZE

_PGA_LIMIT_TARG : default percent of pga_aggregate_target for
ET_PERC pga_aggregate_limit

_PGA_LIMIT_TIME : seconds to wait until direct interrupt
_TO_INTERRUPT

_PGA_LIMIT_TIME : seconds to wait before treating process as idle
_UNTIL_IDLE

_PGA_LIMIT_TIME : seconds to wait before killing session over limit
_UNTIL_KILLED

_PGA_LIMIT_TRAC : trace pga_aggregate_limit activity
ING

_PGA_LIMIT_USE_ : use immediate kill for sessions over limit
IMMEDIATE_KILL

_PGA_LIMIT_WATC : percentage of limit to have processes watch
H_PERC

_PGA_LIMIT_WATC : bytes of PGA usage at which process will begin watching
H_SIZE limit

_PGA_MAX_SIZE : Maximum size of the PGA memory for one process
_PING_WAIT_FOR_ : Wait for log force before block ping
LOG_FORCE

_PIN_TIME_STATI : if TRUE collect statistics for how long a current pin
STICS is held

_PIVOT_IMPLEMEN : pivot implementation method
TATION_METHOD

_PKT_ENABLE : enable progressive kill test
_PKT_PMON_INTER : PMON process clean-up interval (cs)
VAL

_PKT_START : start progressive kill test instrumention
_PLAN_OUTLINE_D : explain plan outline data enabled
ATA

_PLAN_VERIFY_IM : Performance improvement criterion for evolving plan
PROVEMENT_MARGI baselines
N

_PLAN_VERIFY_LO : Local time limit to use for an individual plan
CAL_TIME_LIMIT verification

_PLSQL_ANON_BLO : PL/SQL anonymous block code-type
CK_CODE_TYPE

_PLSQL_CACHE_EN : PL/SQL Function Cache Enabled
ABLE

_PLSQL_DUMP_BUF : conditions upon which the PL/SQL circular buffer is
FER_EVENTS dumped

_PLSQL_MAX_STAC : PL/SQL maximum stack size
K_SIZE

_PLSQL_MINIMUM_ : plsql minimum cache hit percentage required to keep
CACHE_HIT_PERCE caching active
NT

_PLSQL_NATIVE_F : Allocate PL/SQL native frames on the heap if size
RAME_THRESHOLD exceeds this value

_PLSQL_NVL_OPTI : PL/SQL NVL optimize
MIZE

_PLUGGABLE_DATA : Debug flag for pluggable database related operations
BASE_DEBUG

_PMON_DEAD_BLKR : rate to check blockers are alive during cleanup (in
S_ALIVE_CHK_RAT seconds)
E_SECS

_PMON_DEAD_BLKR : max blockers to check during cleanup
S_MAX_BLKRS

_PMON_DEAD_BLKR : max attempts per blocker while checking dead blockers
S_MAX_CLEANUP_A
TTEMPTS

_PMON_DEAD_BLKR : rate to scan for dead blockers during cleanup (in
S_SCAN_RATE_SEC seconds)
S

_PMON_ENABLE_DE : look for dead blockers during PMON cleanup
AD_BLKRS

_PMON_LOAD_CONS : server load balancing constants (S,P,D,I,L,C,M)
TANTS

_PMON_MAX_CONSE : PMON max consecutive posts in main loop
C_POSTS

_POST_WAIT_QUEU : Post Wait Queues – Num Dynamic Queues
ES_DYNAMIC_QUEU
ES

_POST_WAIT_QUEU : Post Wait Queues – Num Per Class
ES_NUM_PER_CLAS
S

_PQQ_DEBUG_TXN_ : pq queuing transaction active
ACT

_PQQ_ENABLED : Enable Resource Manager based Parallel Statement
Queuing

_PRECOMPUTE_GID : precompute gid values and copy them before returning a
_VALUES row

_PREDICATE_ELIM : allow predicate elimination if set to TRUE
INATION_ENABLED

_PRED_MOVE_AROU : enables predicate move-around
ND

_PRED_PUSH_CDB_ : predicate pushdown enabled for CDB views
VIEW_ENABLED

_PREFERED_STAND : standby db_unique_name prefered for krb operations
BY

_PRESCOMM : presume commit of IMU transactions
_PRE_REWRITE_PU : push predicates into views before rewrite
SH_PRED

_PRINT_INMEM_HE : print inmem ilm heatmap
ATMAP

_PRINT_REFRESH_ : enable dbms_output of materialized view refresh
SCHEDULE schedule

_PRINT_STAT_SEG : print ilm statistics segment
MENT

_PRIVATE_MEMORY : Start address of large extent memory segment
_ADDRESS

_PROJECTION_PUS : projection pushdown
HDOWN

_PROJECTION_PUS : level for projection pushdown debugging
HDOWN_DEBUG

_PROJECT_VIEW_C : enable projecting out unreferenced columns of a view
OLUMNS

_PROP_OLD_ENABL : Shift to pre 11g propagation behaviour
ED

_PROTECT_FRAME_ : Protect cursor frame heaps
HEAPS

_PTN_CACHE_THRE : flags and threshold to control partition metadata
SHOLD caching

_PUSH_JOIN_PRED : enable pushing join predicate inside a view
ICATE

_PUSH_JOIN_UNIO : enable pushing join predicate inside a union all view
N_VIEW

_PUSH_JOIN_UNIO : enable pushing join predicate inside a union view
N_VIEW2

_PX_ADAPTIVE_DI : determines the behavior of adaptive distribution
ST_METHOD methods

_PX_ADAPTIVE_DI : Buffering / decision threshold for adaptive
ST_METHOD_THRES distribution methods
HOLD

_PX_ADAPTIVE_OF : percentage for PQ adaptive offloading of granules
FLOAD_PERCENTAG
E

_PX_ADAPTIVE_OF : threshold (GB/s) for PQ adaptive offloading of granules
FLOAD_THRESHOLD

_PX_ASYNC_GETGR : asynchronous get granule in the slave
ANULE

_PX_BACK_TO_PAR : allow going back to parallel after a serial operation
ALLEL

_PX_BIND_PEEK_S : enables sharing of px cursors that were built using
HARING bind peeking

_PX_BROADCAST_F : set the tq broadcasting fudge factor percentage
UDGE_FACTOR

_PX_BUFFER_TTL : ttl for px mesg buffers in seconds
_PX_CDB_VIEW_EN : parallel cdb view evaluation enabled
ABLED

_PX_CHUNKLIST_C : ratio of the number of chunk lists to the default DOP
OUNT_RATIO per instance

_PX_COMPILATION : debug level for parallel compilation
_DEBUG

_PX_COMPILATION : tracing level for parallel compilation
_TRACE

_PX_CONCURRENT : enables pq with concurrent execution of serial inputs
_PX_CPU_AUTODOP : enables or disables auto dop cpu computation
_ENABLED

_PX_CPU_OPERATO : CPU operator bandwidth in MB/sec for DOP computation
R_BANDWIDTH

_PX_CPU_PROCESS : CPU process bandwidth in MB/sec for DOP computation
_BANDWIDTH

_PX_DP_ARRAY_SI : Max number of pq processes supported
ZE

_PX_DUMP_12805_ : enables or disables tracing of 12805 signal source
SOURCE

_PX_DYNAMIC_OPT : turn off/on restartable qerpx dynamic optimization
_PX_DYNAMIC_SAM : num of samples for restartable qerpx dynamic
PLE_SIZE optimization

_PX_EXECUTION_S : enable service-based constraint of px slave allocation
ERVICES_ENABLED

_PX_FILTER_PARA : enables or disables correlated filter parallelization
LLELIZED

_PX_FILTER_SKEW : enable correlated filter parallelization to handle skew
_HANDLING

_PX_FREELIST_LA : Divide the computed number of freelists by this power
TCH_DIVISOR of 2

_PX_GIM_FACTOR : weighted autodop global index maintenance factor
_PX_GRANULE_BAT : maximum size of a batch of granules
CH_SIZE

_PX_GRANULE_RAN : enables or disables randomization of parallel scans
DOMIZE rowid granules

_PX_GRANULE_SIZ : default size of a rowid range granule (in KB)
E

_PX_GROUPBY_PUS : perform group-by pushdown for parallel query
HDOWN

_PX_HOLD_TIME : hold px at execution time (unit: second)
_PX_HYBRID_TSM_ : Enable Hybrid Temp Segment Merge/High Water Mark
HWMB_LOAD Brokered load method

_PX_INDEX_SAMPL : parallel query sampling for index create based on
ING_OBJSIZE object size

_PX_IO_PROCESS_ : IO process bandwidth in MB/sec for computing DOP
BANDWIDTH

_PX_IO_SYSTEM_B : total IO system bandwidth in MB/sec for computing DOP
ANDWIDTH

_PX_JOIN_SKEW_H : enables skew handling for parallel joins
ANDLING

_PX_JOIN_SKEW_M : sets minimum frequency(%) for skewed value for parallel
INFREQ joins

_PX_JOIN_SKEW_R : sets skew ratio for parallel joins
ATIO

_PX_KXIB_TRACIN : turn on kxib tracing
G

_PX_LOAD_BALANC : parallel load balancing policy
ING_POLICY

_PX_LOAD_FACTOR : weighted autodop load factor
_PX_LOAD_MONITO : threshold for pushing information to load slave
R_THRESHOLD workload monitor

_PX_LOAD_PUBLIS : interval at which LMON will check whether to publish PX
H_INTERVAL load

_PX_LOC_MSG_COS : CPU cost to send a PX message via shared memory
T

_PX_MAX_GRANULE : maximum number of rowid range granules to generate per
S_PER_SLAVE slave

_PX_MAX_MAP_VAL : Maximum value of rehash mapping for PX
_PX_MAX_MESSAGE : percentage of shared pool for px msg buffers range
_POOL_PCT [5,90]

_PX_MESSAGE_COM : enable compression of control messages for parallel
PRESSION query

_PX_MINUS_INTER : enables pq for minus/interect operators
SECT

_PX_MIN_GRANULE : minimum number of rowid range granules to generate per
S_PER_SLAVE slave

_PX_MONITOR_LOA : enable consumer load slave workload monitoring
D

_PX_NET_MSG_COS : CPU cost to send a PX message over the internconnect
T

_PX_NO_GRANULE_ : prevent parallel partition granules to be sorted on
SORT size

_PX_NO_STEALING : prevent parallel granule stealing in shared nothing
environment

_PX_NSS_PLANB : enables or disables NSS Plan B reparse with outline
_PX_NUMA_STEALI : enable/disable PQ granule stealing across NUMA nodes
NG_ENABLED

_PX_NUMA_SUPPOR : enable/disable PQ NUMA support
T_ENABLED

_PX_OBJECT_SAMP : parallel query sampling for base objects (100000 =
LING 100%)

_PX_OBJECT_SAMP : use base object sampling when possible for range
LING_ENABLED distribution

_PX_ONEPASS_SLA : enable/disable one pass slave acquisition for parallel
VE_ACQUISITION execution

_PX_PARALLELIZE : enables or disables expression evaluation
_EXPRESSION parallelization

_PX_PARTIAL_ROL : perform partial rollup pushdown for parallel execution
LUP_PUSHDOWN

_PX_PARTITION_S : enables or disables parallel partition-based scan
CAN_ENABLED

_PX_PARTITION_S : least number of partitions per slave to start
CAN_THRESHOLD partition-based scan

_PX_PROACTIVE_S : parallel proactive slave allocation threshold/unit
LAVE_ALLOC_THRE
SHOLD

_PX_PROC_CONSTR : reduce parallel_max_servers if greater than (processes
AIN – fudge)

_PX_PWG_ENABLED : parallel partition wise group by enabled
_PX_PWMR_ENABLE : parallel partition wise match recognize enabled
D

_PX_REPLICATION : enables or disables replication of small table scans
_ENABLED

_PX_ROUND_ROBIN : round robin row count to enq to next slave
_ROWCNT

_PX_ROWNUM_PD : turn off/on parallel rownum pushdown optimization
_PX_SEND_TIMEOU : IPC message send timeout value in seconds
T

_PX_SINGLE_SERV : allow single-slave dfo in parallel query
ER_ENABLED

_PX_SLAVES_SHAR : slaves share cursors with QC
E_CURSORS

_PX_TQ_ROWHVS : turn on intra-row hash valueing sharing in TQ
_PX_TRACE : px trace parameter
_PX_UAL_SERIAL_ : enables new pq for UNION operators
INPUT

_PX_USE_LARGE_P : Use Large Pool as source of PX buffers
OOL

_PX_WIF_DFO_DEC : NDV-aware DFO clumping of multiple window sorts
LUMPING

_PX_WIF_EXTEND_ : extend TQ data redistribution keys for window functions
DISTRIBUTION_KE
YS

_PX_WIF_MIN_NDV : mininum NDV of TQ keys needed per slave for scalable
_PER_SLAVE WiF PX

_PX_XTGRANULE_S : default size of a external table granule (in KB)
IZE

_QA_CONTROL : Oracle internal parameter to control QA
_QA_LRG_TYPE : Oracle internal parameter to specify QA lrg type
_QUERY_COST_REW : perform the cost based rewrite with materialized views
RITE

_QUERY_EXECUTIO : max size of query execution cache
N_CACHE_MAX_SIZ
E

_QUERY_MMVREWRI : query mmv rewrite maximum number of cmaps per dmap in
TE_MAXCMAPS query disjunct

_QUERY_MMVREWRI : query mmv rewrite maximum number of dmaps per query
TE_MAXDMAPS disjunct

_QUERY_MMVREWRI : query mmv rewrite maximum number of in-lists per
TE_MAXINLISTS disjunct

_QUERY_MMVREWRI : query mmv rewrite maximum number of intervals per
TE_MAXINTERVALS disjunct

_QUERY_MMVREWRI : query mmv rewrite maximum number of predicates per
TE_MAXPREDS disjunct

_QUERY_MMVREWRI : query mmv rewrite maximum number of query in-list
TE_MAXQRYINLIST values
VALS

_QUERY_MMVREWRI : query mmv rewrite maximum number of region permutations
TE_MAXREGPERM

_QUERY_ON_PHYSI : query on physical
CAL

_QUERY_REWRITE_ : perform query rewrite before&after or only before view
1 merging

_QUERY_REWRITE_ : perform query rewrite before&after or only after view
2 merging

_QUERY_REWRITE_ : mv rewrite and drop redundant joins
DRJ

_QUERY_REWRITE_ : rewrite with cannonical form for expressions
EXPRESSION

_QUERY_REWRITE_ : mv rewrite fresh partition containment
FPC

_QUERY_REWRITE_ : cost based query rewrite with MVs fudge factor
FUDGE

_QUERY_REWRITE_ : mv rewrite with jg migration
JGMIGRATE

_QUERY_REWRITE_ : query rewrite max disjuncts
MAXDISJUNCT

_QUERY_REWRITE_ : allow query rewrite, if referenced tables are not
OR_ERROR dataless

_QUERY_REWRITE_ : perform general rewrite using set operator summaries
SETOPGRW_ENABLE

_QUERY_REWRITE_ : prune frocol chain before rewrite after view-merging
VOP_CLEANUP

_QUEUE_BUFFER_M : max number of bytes to dump to trace file for queue
AX_DUMP_LEN buffer dump

_RADM_ENABLED : Data Redaction
_RBR_CKPT_TRACI : Enable reuse block range checkpoint tracing
NG

_RCFG_DISABLE_V : if TRUE disables verify at reconfiguration
ERIFY

_RCFG_PARALLEL_ : if TRUE enables parallel fixwrite at reconfiguration
FIXWRITE

_RCFG_PARALLEL_ : if TRUE enables parallel replay and cleanup at
REPLAY reconfiguration

_RCFG_PARALLEL_ : if TRUE enables parallel verify at reconfiguration
VERIFY

_RDBMS_COMPATIB : default RDBMS compatibility level
ILITY

_RDBMS_INTERNAL : enable CELL FPLIB filtering within rdbms
_FPLIB_ENABLED

_RDBMS_INTERNAL : enable reraising of any exceptions in CELL FPLIB
_FPLIB_RAISE_ER
RORS

_READABLE_STAND : readable standby query scn sync timeout
BY_SYNC_TIMEOUT

_READ_MOSTLY_EN : Read mostly instances enable non-privileged logons
ABLE_LOGON

_READ_MOSTLY_IN : indicates this is a read_mostly instance
STANCE

_READ_MOSTLY_IN : internal parameter to control read mostly instance QA
STANCE_QA_CONTR
OL

_READ_MOSTLY_SL : Time to wait on read mostly node when hub not available
AVE_TIMEOUT

_READ_ONLY_VIOL : read-only violation dump to trace files
ATION_DUMP_TO_T
RACE

_READ_ONLY_VIOL : read-only violation array max count
ATION_MAX_COUNT

_READ_ONLY_VIOL : read-only violation array per module max count
ATION_MAX_COUNT
_PER_MODULE

_REALFREE_HEAP_ : minimum max total heap size, in Kbytes
MAX_SIZE

_REALFREE_HEAP_ : mode flags for real-free heap
MODE

_REALFREE_HEAP_ : hint for real-free page size in bytes
PAGESIZE

_REALFREE_PQ_HE : hint for pq real-free page size in bytes
AP_PAGESIZE

_REAL_TIME_APPL : Simulation value with real time apply
Y_SIM

_RECOVERABLE_RE : Recoverable recovery batch size (percentage of buffer
COVERY_BATCH_PE cache)
RCENT

_RECOVERY_ASSER : if TRUE, enable expensive integrity checks
TS

_RECOVERY_PERCE : recovery buffer cache percentage
NTAGE

_RECOVERY_READ_ : number of recovery reads which can be outstanding
LIMIT

_RECOVERY_SKIP_ : allow media recovery even if controlfile seq check
CFSEQ_CHECK fails

_RECOVERY_VERIF : enable thread recovery write verify
Y_WRITES

_RECURSIVE_IMU_ : recursive transactions may be IMU
TRANSACTIONS

_RECURSIVE_WITH : check for maximum level of recursion instead of
_MAX_RECURSION_ checking for cycles
LEVEL

_REDEF_ON_STATE : Use on-statement refresh in online redefinition
MENT

_REDO_COMPATIBI : general and redo/undo compatibility sanity check
LITY_CHECK

_REDO_LOG_DEBUG : Various configuration flags for debugging redo logs
_CONFIG

_REDO_LOG_RECOR : Life time in hours for redo log table records
D_LIFE

_REDO_READ_FROM : Enable reading redo from in-memory log buffer
_MEMORY

_REDO_TRANSPORT : Is ASYNC LNS compression allowed?
_COMPRESS_ALL

_REDO_TRANSPORT : redo transport sanity check bit mask
_SANITY_CHECK

_REDO_TRANSPORT : I/O stall time before terminating redo transport
_STALL_TIME process

_REDO_TRANSPORT : long I/O stall time before terminating redo transport
_STALL_TIME_LON process
G

_REDO_TRANSPORT : test stream connection?
_STREAM_TEST

_REDO_TRANSPORT : Stream network writes?
_STREAM_WRITES

_REDO_TRANSPORT : VIO size requirement
_VIO_SIZE_REQ

_REDUCE_SBY_LOG : enable standby log scan optimization
_SCAN

_REGION_NAME : gsm region name
_RELEASE_INSERT : maximum number of unusable blocks to unlink from
_THRESHOLD freelist

_RELIABLE_BLOCK : if TRUE, no side channel on reliable interconnect
_SENDS

_RELOCATE_PDB : Relocate PDB to another RAC instance after it is closed
in the current instance

_RELOCATION_COM : ASM relocation commit batch size
MIT_BATCH_SIZE

_REMOTE_ASM : remote ASM configuration
_REMOTE_AWR_ENA : Enable/disable Remote AWR Mode
BLED

_REMOVE_AGGR_SU : enables removal of subsumed aggregated subquery
BQUERY

_REMOVE_EXF_COM : enable/disable removing of components EXF and RUL
PONENT during upgrade

_REPLACE_VIRTUA : replace expressions with virtual columns
L_COLUMNS

_REPORT_CAPTURE : Time (in sec) between two cycles of report capture
_CYCLE_TIME daemon

_REPORT_CAPTURE : 100X Percent of system db time daemon is allowed over
_DBTIME_PERCENT 10 cycles
_CUTOFF

_REPORT_CAPTURE : No of report capture cycles after which db time is
_RECHARGE_WINDO recharged
W

_REPORT_CAPTURE : Length of time band (in hours) in the reports time
_TIMEBAND_LENGT bands table
H

_REPORT_REQUEST : Time (in min) after which a report request is deleted
_AGEOUT_MINUTES from queue

_REP_BASE_PATH : base path for EM reports in database
_RESET_MAXCAP_H : reset maxcap history time
ISTORY

_RESOURCE_INCLU : Whether RESOURCE role includes UNLIMITED TABLESPACE
DES_UNLIMITED_T privilege
ABLESPACE

_RESOURCE_MANAG : disable the resource manager always
ER_ALWAYS_OFF

_RESOURCE_MANAG : resource mgr top plan for internal use
ER_PLAN

_RESTORE_MAXOPE : restore assumption for maxopenfiles
NFILES

_RESTORE_SPFILE : restore spfile to this location
_RESULT_CACHE_A : result cache auto dml monitoring duration
UTO_DML_MONITOR
ING_DURATION

_RESULT_CACHE_A : result cache auto dml monitoring slot
UTO_DML_MONITOR
ING_SLOTS

_RESULT_CACHE_A : result cache auto dml threshold
UTO_DML_THRESHO
LD

_RESULT_CACHE_A : result cache auto dml trend threshold
UTO_DML_TREND_T
HRESHOLD

_RESULT_CACHE_A : result cache auto execution threshold
UTO_EXECUTION_T
HRESHOLD

_RESULT_CACHE_A : result cache auto max size allowed
UTO_SIZE_THRESH
OLD

_RESULT_CACHE_A : result cache auto time distance
UTO_TIME_DISTAN
CE

_RESULT_CACHE_A : result cache auto time threshold
UTO_TIME_THRESH
OLD

_RESULT_CACHE_B : result cache block size
LOCK_SIZE

_RESULT_CACHE_C : blocks to copy instead of pinning the result
OPY_BLOCK_COUNT

_RESULT_CACHE_D : result cache deterministic PLSQL functions
ETERMINISTIC_PL
SQL

_RESULT_CACHE_G : Are results available globally across RAC?
LOBAL

_RESULT_CACHE_T : maximum time (sec) a session waits for a result
IMEOUT

_RESUMABLE_CRIT : raise critical alert for resumable failure
ICAL_ALERT

_REUSE_INDEX_LO : number of blocks being examine for index block reuse
OP

_RE_FAST_SQL_OP : enables fast boxable sql operator
ERATOR

_RE_INDEPENDENT : defines max number of compiled cached expressions for
_EXPRESSION_CAC iee
HE_SIZE

_RE_NUM_COMPLEX : defines max number of compiled complex operator per
_OPERATOR ruleset-iee

_RE_NUM_ROWCACH : defines max number of complex operators loaded with row
E_LOAD cache

_RE_RESULT_CACH : defines max number key for result cache hash table
E_KEYSIZ

_RE_RESULT_CACH : defines max number of cached elements for result cache
E_SIZE

_RIGHT_OUTER_HA : Right Outer/Semi/Anti Hash Enabled
SH_ENABLE

_RMAN_IO_PRIORI : priority at which rman backup i/o’s are done
TY

_RMAN_ROUNDROBI : Numa round robin placement for RMAN procs
N_PLACEMENT

_RM_CLUSTER_INT : interconnects for RAC use (RM)
ERCONNECTS

_RM_NUMA_SCHED_ : Is Resource Manager (RM) related NUMA scheduled policy
ENABLE enabled

_RM_NUMA_SIMULA : number of cpus for each pg for numa simulation in
TION_CPUS resource manager

_RM_NUMA_SIMULA : number of PGs for numa simulation in resource manager
TION_PGS

_ROLLBACK_SEGME : number of undo segments
NT_COUNT

_ROLLBACK_SEGME : starting undo segment number
NT_INITIAL

_ROLLBACK_STOPA : stop at -position to step rollback
T

_ROND_TEST_MODE : rac one node test mode
_ROWLEN_FOR_CHA : maximum rowlen above which rows may be chained across
INING_THRESHOLD blocks

_ROWSETS_CDB_VI : rowsets enabled for CDB views
EW_ENABLED

_ROWSETS_ENABLE : enable/disable rowsets
D

_ROWSETS_MAX_RO : maximum number of rows in a rowset
WS

_ROWSETS_TARGET : target size in bytes for space reserved in the frame
_MAXSIZE for a rowset

_ROWSOURCE_EXEC : if TRUE, Oracle will collect rowsource statistics
UTION_STATISTIC
S

_ROWSOURCE_PROF : if TRUE, Oracle will capture active row sources in
ILING_STATISTIC v$active_session_history
S

_ROWSOURCE_STAT : frequency of rowsource statistic sampling (must be a
ISTICS_SAMPFREQ power of 2)

_ROWSRC_TRACE_L : Row source tree tracing level
EVEL

_ROW_CACHE_CURS : number of cached cursors for row cache management
ORS

_ROW_CR : enable row cr for all sql
_ROW_LOCKING : row-locking
_ROW_SHIPPING_E : enable row shipping explain plan support
XPLAIN

_ROW_SHIPPING_T : row shipping column selection threshold
HRESHOLD

_RTADDM_TRIGGER : comma-separated list of numeric arguments for RT addm
_ARGS trigger

_RTADDM_TRIGGER : To enable or disable Real-Time ADDM automatic trigger
_ENABLED

_RTA_SYNC_WAIT_ : RTA sync wait timeout
TIMEOUT

_RTC_INFEASIBLE : Redo Transport Compression infeasible threshold
_THRESHOLD

_SAMPLE_ROWS_PE : number of rows per block used for sampling IO
R_BLOCK optimization

_SCALAR_TYPE_LO : threshold for VARCHAR2, NVARCHAR2, and RAW storage as
B_STORAGE_THRES BLOB
HOLD

_SCATTER_GCS_RE : if TRUE, gcs resources are scattered uniformly across
SOURCES sub pools

_SCATTER_GCS_SH : if TRUE, gcs shadows are scattered uniformly across sub
ADOWS pools

_SCHED_DELAY_MA : scheduling delay maximum number of samples
X_SAMPLES

_SCHED_DELAY_ME : scheduling delay mesurement sleep us
ASUREMENT_SLEEP
_US

_SCHED_DELAY_OS : os tick granularity used by scheduling delay
_TICK_GRANULARI calculations
TY_US

_SCHED_DELAY_SA : scheduling delay sample collection duration threshold
MPLE_COLLECTION ms
_THRESH_MS

_SCHED_DELAY_SA : scheduling delay sampling interval in ms
MPLE_INTERVAL_M
S

_SCN_WAIT_INTER : max exponential backoff time for scn wait interface in
FACE_MAX_BACKOF kta
F_TIME_SECS

_SCN_WAIT_INTER : max timeout for scn wait interface in kta
FACE_MAX_TIMEOU
T_SECS

_SDIAG_CRASH : sql diag crash
_SECOND_SPARE_P : second spare parameter – integer
ARAMETER

_SECUREFILES_BR : segment retry before dishonoring retention
EAKRETEN_RETRY

_SECUREFILES_BU : securefiles segment insert only optization
LKINSERT

_SECUREFILES_CO : securefiles concurrency estimate
NCURRENCY_ESTIM
ATE

_SECUREFILES_FG : segment retry before foreground waits
_RETRY

_SECUREFILES_FO : securefiles force flush before allocation
RCEFLUSH

_SECUREFILES_ME : securefiles memory as percent of SGA
MORY_PERCENTOFS
GA

_SECUREFILES_SP : securefiles segment utl optimization
CUTL

_SECUREFILE_LOG : Maximum number of open descriptors for securefile log
_NUM_LATCHES

_SECUREFILE_LOG : Size of securefile log buffer pool from SGA
_SHARED_POOL_SI
ZE

_SECUREFILE_TIM : collect kdlu timers and accumulate per layers
ERS

_SEC_ENABLE_TES : Whether to enable the test RPCs
T_RPCS

_SELECTIVITY_FO : enable/disable selectivity for storage reduction factor
R_SRF_ENABLED

_SELECT_ANY_DIC : Exclude USER$, XS$VERIFIERS, ENC$ and DEFAULT_PWD$ from
TIONARY_SECURIT SELECT ANY DICTIONARY system privilege
Y_ENABLED

_SELFJOIN_MV_DU : control rewrite self-join algorithm
PLICATES

_SELFTUNE_CHECK : Self-tune checkpointing lag the tail of the redo log
POINTING_LAG

_SELFTUNE_CHECK : Percentage of total physical i/os for self-tune ckpt
POINT_WRITE_PCT

_SEM_PER_SEMID : the exact number of semaphores per semaphore set to
allocate

_SEND_AST_TO_FO : if TRUE, send ast message to foreground
REGROUND

_SEND_CLOSE_WIT : if TRUE, send close with block even with direct sends
H_BLOCK

_SEND_REQUESTS_ : if TRUE, try to send CR requests to PI buffers
TO_PI

_SERIALIZABLE : serializable
_SERIALIZE_LGWR : Serialize LGWR SYNC local and remote io
_SYNC_IO

_SERIAL_DIRECT_ : enable direct read in serial
READ

_SERIAL_LOG_WRI : Serialize log write slave I/O
TE_WORKER_IO

_SERIAL_RECOVER : force serial recovery or parallel recovery
Y

_SERVICE_CLEANU : timeout to peform service cleanup
P_TIMEOUT

_SESSION_ALLOCA : one latch per group of sessions
TION_LATCHES

_SESSION_CACHED : Number of pl/sql instantiations to cache in a session.
_INSTANTIATIONS

_SESSION_CONTEX : session app context size
T_SIZE

_SESSION_IDLE_B : one latch per session or a latch per group of sessions
IT_LATCHES

_SESSION_PAGE_E : Session Page Extent Size
XTENT

_SESSION_WAIT_H : enable session wait history collection
ISTORY

_SET_CONTAINER_ : set container service
SERVICE

_SET_MGD_RECOVE : set mgd recovery state to new value
RY_STATE

_SEVENTEENTH_SP : seventeenth spare parameter – string
ARE_PARAMETER

_SEVENTH_SPARE_ : seventh spare parameter – integer
PARAMETER

_SF_DEFAULT_ENA : enable 12g securefile default
BLED

_SGA_ALLOC_SLAV : Termination timeout in secs for SA** slaves
ES_TERM_TIMEOUT
_SECS

_SGA_CLEAR_DUMP : Allow dumping encrypted blocks in clear for debugging
_SGA_EARLY_TRAC : sga early trace event
E

_SGA_LOCKING : sga granule locking state
_SHARED_IOP_MAX : maximum shared io pool size
_SIZE

_SHARED_IO_POOL : Shared IO pool buffer size
_BUF_SIZE

_SHARED_IO_POOL : trace kcbi debug info to tracefile
_DEBUG_TRC

_SHARED_IO_POOL : Size of shared IO pool
_SIZE

_SHARED_IO_SET_ : shared io pool size set internal value – overwrite zero
VALUE user size

_SHARED_POOL_MA : shared pool maximum size when auto SGA enabled
X_SIZE

_SHARED_POOL_MI : shared pool minimum size when auto SGA enabled
NSIZE_ON

_SHARED_POOL_RE : minimum allocation size in bytes for reserved area of
SERVED_MIN_ALLO shared pool
C

_SHARED_POOL_RE : percentage memory of the shared pool allocated for the
SERVED_PCT reserved area

_SHARED_SERVER_ : shared server load balance
LOAD_BALANCE

_SHARED_SERVER_ : number of shared server common queues
NUM_QUEUES

_SHMPROTECT : allow mprotect use for shared memory
_SHORT_STACK_TI : short stack timeout in ms
MEOUT_MS

_SHOW_MGD_RECOV : Show internal managed recovery state
ERY_STATE

_SHRD_QUE_TM_PR : number of sharded queue Time Managers to start
OCESSES

_SHRD_QUE_TM_ST : Shaded queue statistics collection window duration
ATISTICS_DURATI
ON

_SHRUNK_AGGS_DI : percentage of exceptions at which to switch to full
SABLE_THRESHOLD length aggs

_SHRUNK_AGGS_EN : enable use of variable sized buffers for non-distinct
ABLED aggregates

_SHUTDOWN_COMPL : minutes for shutdown operation to wait for sessions to
ETION_TIMEOUT_M complete
INS

_SIDE_CHANNEL_B : number of messages to batch in a side channel message
ATCH_SIZE (DFS)

_SIDE_CHANNEL_B : timeout before shipping out the batched side
ATCH_TIMEOUT channelmessages in seconds

_SIDE_CHANNEL_B : timeout before shipping out the batched side
ATCH_TIMEOUT_MS channelmessages in milliseconds

_SIMPLE_VIEW_ME : control simple view merging performed by the optimizer
RGING

_SIMULATED_LOG_ : Simulated latency of log writes (usecs)
WRITE_USECS

_SIMULATE_DISK_ : Enables skgfr to report simulated disk sector size
SECTORSIZE

_SIMULATE_IO_WA : Simulate I/O wait to test segment advisor
IT

_SIMULATE_MEM_T : simulate auto memory sga/pga transfers
RANSFER

_SIMULATOR_BUCK : LRU bucket minimum delta
ET_MINDELTA

_SIMULATOR_INTE : simulator internal bound percent
RNAL_BOUND

_SIMULATOR_LRU_ : LRU list rebalance threshold (size)
REBALANCE_SIZTH
R

_SIMULATOR_LRU_ : LRU list rebalance threshold (count)
REBALANCE_THRES
H

_SIMULATOR_LRU_ : LRU scan count
SCAN_COUNT

_SIMULATOR_PIN_ : maximum count of invalid chunks on pin list
INVAL_MAXCNT

_SIMULATOR_RESE : simulator reserved heap count
RVED_HEAP_COUNT

_SIMULATOR_RESE : simulator reserved object count
RVED_OBJ_COUNT

_SIMULATOR_SAMP : sampling factor for the simulator
LING_FACTOR

_SIMULATOR_UPPE : upper bound multiple of pool size
R_BOUND_MULTIPL
E

_SINGLE_PROCESS : run without detached processes
_SIOP_FLASHBACK : Shared IO pool flashback io completion scan depth
_SCANDEPTH

_SIOP_PERC_OF_B : percentange * 100 of cache to transfer to shared io
C_X100 pool

_SIXTEENTH_SPAR : sixteenth spare parameter – string
E_PARAMETER

_SIXTH_SPARE_PA : sixth spare parameter – integer
RAMETER

_SKGXPG_LAST_PA : last defined skgxpg parameter – oss
RAMETER

_SKGXP_ANT_OPTI : SKGXP ANT options (oss)
ONS

_SKGXP_CTX_FLAG : IPC debug options flags (oss)
S1

_SKGXP_CTX_FLAG : IPC debug options flags mask (oss)
S1MASK

_SKGXP_DYNAMIC_ : IPC protocol override
PROTOCOL (!0/-1=*,2=UDP,3=RDS,0x1000=ipc_X)

_SKGXP_GEN_ANT_ : VRPC request timeout when ANT disabled
OFF_RPC_TIMEOUT
_IN_SEC

_SKGXP_GEN_ANT_ : ANT protocol ping miss count
PING_MISSCOUNT

_SKGXP_GEN_RPC_ : ANT ping protocol miss count
NO_PATH_CHECK_I
N_SEC

_SKGXP_GEN_RPC_ : VRPC request timeout when ANT enabled
TIMEOUT_IN_SEC

_SKGXP_INETS : limit SKGXP networks (oss)
_SKGXP_MIN_RPC_ : IPC threshold for rpc rcv zcpy operation (default = 0 –
RCV_ZCPY_LEN disabled)

_SKGXP_MIN_ZCPY : IPC threshold for zcpy operation (default = 0 –
_LEN disabled)

_SKGXP_REAPING : tune skgxp OSD reaping limit
_SKGXP_RGN_PORT : region socket limits (0xFFFFNNXX): F=flags, N=min,
S X=max

_SKGXP_SPARE_PA : ipc oss spare parameter 1
RAM1

_SKGXP_SPARE_PA : ipc oss spare parameter 2
RAM2

_SKGXP_SPARE_PA : ipc oss spare parameter 3
RAM3

_SKGXP_SPARE_PA : ipc oss spare parameter 4
RAM4

_SKGXP_SPARE_PA : ipc oss spare parameter 5
RAM5

_SKGXP_UDP_ACH_ : time in minutes before idle ach’s are reaped
REAPING_TIME

_SKGXP_UDP_ACK_ : Enables delayed acks
DELAY

_SKGXP_UDP_ENAB : Enables dynamic credit management
LE_DYNAMIC_CRED
IT_MGMT

_SKGXP_UDP_HIWA : ach hiwat mark warning interval
T_WARN

_SKGXP_UDP_INTE : time in seconds between interface detection checks
RFACE_DETECTION
_TIME_SECS

_SKGXP_UDP_KEEP : connection idle time in seconds before keep alive is
_ALIVE_PING_TIM initiated. min: 30 sec max: 1800 sec default: 300 sec
ER_SECS

_SKGXP_UDP_LMP_ : MTU size for UDP LMP testing
MTUSIZE

_SKGXP_UDP_LMP_ : enable UDP long message protection
ON

_SKGXP_UDP_TIME : diagnostic log buffering space (in bytes) for timed
D_WAIT_BUFFERIN wait (0 means unbufferd
G

_SKGXP_UDP_TIME : time in seconds before timed wait is invoked
D_WAIT_SECONDS

_SKGXP_UDP_USE_ : disable use of high speek timer
TCB

_SKGXP_ZCPY_FLA : IPC zcpy options flags
GS

_SKIP_ACFS_CHEC : Override checking if on an ACFS file system
KS

_SKIP_ASSUME_MS : if TRUE, skip assume message for consigns at the master
G

_SKIP_TRSTAMP_C : Skip terminal recovery stamp check
HECK

_SLAVE_MAPPING_ : enable slave mapping when TRUE
ENABLED

_SLAVE_MAPPING_ : force the number of slave group in a slave mapper
GROUP_SIZE

_SLAVE_MAPPING_ : maximum skew before slave mapping is disabled
SKEW_RATIO

_SMALL_TABLE_TH : lower threshold level of table size for direct reads
RESHOLD

_SMM_ADVICE_ENA : if TRUE, enable v$pga_advice
BLED

_SMM_ADVICE_LOG : overwrites default size of the PGA advice workarea
_SIZE history log

_SMM_AUTO_COST_ : if TRUE, use the AUTO size policy cost functions
ENABLED

_SMM_AUTO_MAX_I : Maximum IO size (in KB) used by sort/hash-join in auto
O_SIZE mode

_SMM_AUTO_MIN_I : Minimum IO size (in KB) used by sort/hash-join in auto
O_SIZE mode

_SMM_BOUND       : overwrites memory manager automatically computed bound
_SMM_CONTROL     : provides controls on the memory manager
_SMM_FREEABLE_R : value in KB of the instance freeable PGA memory to
ETAIN               retain

_SMM_ISORT_CAP : maximum work area for insertion sort(v1)
_SMM_MAX_SIZE : maximum work area size in auto mode (serial)
_SMM_MAX_SIZE_S : static maximum work area size in auto mode (serial)
TATIC

_SMM_MIN_SIZE : minimum work area size in auto mode
_SMM_PX_MAX_SIZ : maximum work area size in auto mode (global)
E

_SMM_PX_MAX_SIZ : static maximum work area size in auto mode (global)
E_STATIC

_SMM_RETAIN_SIZ : work area retain size in SGA for shared server sessions
E (0 for AUTO)

_SMM_TRACE : Turn on/off tracing for SQL memory manager
_SMON_INTERNAL_ : limit of SMON internal errors
ERRLIMIT

_SMON_UNDO_SEG_ : limit of SMON continous undo segments re-scan
RESCAN_LIMIT

_SMU_DEBUG_MODE : <debug-flag> – set debug event for testing SMU
operations

_SMU_ERROR_SIMU : site ID of error simulation in KTU code
LATION_SITE

_SMU_ERROR_SIMU : error type for error simulation in KTU code
LATION_TYPE

_SMU_TIMEOUTS : comma-separated *AND double-quoted* list of AUM
timeouts: mql, tur, sess_exprn, qry_exprn, slot_intvl

_SNAPSHOT_RECOV : enable/disable snapshot recovery
ERY_ENABLED

_SORT_ELIMINATI : cost ratio for sort eimination under first_rows mode
ON_COST_RATIO

_SORT_MULTIBLOC : multi-block read count for sort
K_READ_COUNT

_SORT_SPILL_THR : force sort to spill to disk each time this many rows
ESHOLD are received

_SORT_SYNC_MIN_ : controls the size of mininum run size for synchronized
SPILLSIZE spill (in kb)

_SORT_SYNC_MIN_ : controls the mininum spill size for synchronized spill
SPILL_THRESHOLD (in percent)

_SPACE_ALIGN_SI : space align size
ZE

_SPARE_TEST_PAR : Spare test parameter
AMETER

_SPAWN_DIAG_OPT : thread spawn diagnostic options
S

_SPAWN_DIAG_THR : thread spawn diagnostic minimal threshold in seconds
ESH_SECS

_SPIN_COUNT : Amount to spin waiting for a latch
_SPR_MAX_RULES : maximum number of rules in sql spreadsheet
_SPR_PUSH_PRED_ : push predicates through reference spreadsheet
REFSPR

_SPR_USE_AW_AS : enable AW for hash table in spreadsheet
_SPR_USE_HASH_T : use hash table for spreadsheet
ABLE

_SQLEXEC_PROGRE : sql execution progression monitoring cost threshold
SSION_COST

_SQLMON_BINDS_X : format of column binds_xml in [G]V$SQL_MONITOR
ML_FORMAT

_SQLMON_MAX_PLA : Maximum number of plans entry that can be monitored.
N Defaults to 20 per CPU

_SQLMON_MAX_PLA : Number of plan lines beyond which a plan cannot be
NLINES monitored

_SQLMON_RECYCLE : Minimum time (in s) to wait before a plan entry can be
_TIME recycled

_SQLMON_THRESHO : CPU/IO time threshold before a statement is monitored.
LD 0 is disabled

_SQLTUNE_CATEGO : Parsed category qualifier for applying hintsets
RY_PARSED

_SQL_ANALYZE_EN : SQL Analyze Autonomous Transaction control parameter
ABLE_AUTO_TXN

_SQL_ANALYZE_PA : SQL Analyze Parse Model control parameter
RSE_MODEL

_SQL_COMPATIBIL : sql compatability bit vector
ITY

_SQL_CONNECT_CA : SQL Connect Capability Table Override
PABILITY_OVERRI
DE

_SQL_CONNECT_CA : SQL Connect Capability Table (testing only)
PABILITY_TABLE

_SQL_DIAG_REPO_ : duarations where sql diag repository are retained
ORIGIN

_SQL_DIAG_REPO_ : retain sql diag repository to cursor or not
RETAIN

_SQL_HASH_DEBUG : Hash value of the SQL statement to debug
_SQL_HVSHARE_DE : control hash value sharing debug level
BUG

_SQL_HVSHARE_TH : threshold to control hash value sharing across
RESHOLD operators

_SQL_MODEL_UNFO : specifies compile-time unfolding of sql model forloops
LD_FORLOOPS

_SQL_NCG_MODE : Optimization mode for SQL NCG
_SQL_PLAN_DIREC : controls internal SQL Plan Directive management
TIVE_MGMT_CONTR activities
OL

_SQL_PLAN_MANAG : controls various internal SQL Plan Management
EMENT_CONTROL algorithms

_SQL_SHOW_EXPRE : show expression evalution as shared hash producer in
VAL plan

_SRVNTFN_JOBSUB : srvntfn job submit interval
MIT_INTERVAL

_SRVNTFN_JOB_DE : srvntfn job deq timeout
Q_TIMEOUT

_SRVNTFN_MAX_CO : srvntfn max concurrent jobs
NCURRENT_JOBS

_SRVNTFN_Q_MSGC : srvntfn q msg count for job exit
OUNT

_SRVNTFN_Q_MSGC : srvntfn q msg count increase for job submit
OUNT_INC

_SSCR_DIR : Session State Capture and Restore DIRectory object
_SSCR_OSDIR : Session State Capture and Restore OS DIRectory
_STACK_GUARD_LE : stack guard level
VEL

_STANDBY_CAUSAL : readable standby causal heartbeat timeout
_HEARTBEAT_TIME
OUT

_STANDBY_FLUSH_ : standby flush mode
MODE

_STANDBY_IMPLIC : minutes to wait for redo during standby implicit
IT_RCV_TIMEOUT recovery

_STANDBY_SWITCH : Number of secords for standby switchover enqueue
OVER_TIMEOUT timeout

_STATIC_BACKGRO : static backgrounds
UNDS

_STATISTICS_BAS : enable/disable the use of statistics for storage
ED_SRF_ENABLED reduction factor

_STAT_AGGS_ONE_ : enable one pass algorithm for variance-related
PASS_ALGORITHM functions

_STA_CONTROL : SQL Tuning Advisory control parameter
_STEP_DOWN_LIMI : step down limit in percentage
T_IN_PCT

_STREAMS_POOL_M : streams pool maximum size when auto SGA enabled
AX_SIZE

_SUBQUERY_PRUNI : subquery pruning cost factor
NG_COST_FACTOR

_SUBQUERY_PRUNI : enable the use of subquery predicates to perform
NG_ENABLED pruning

_SUBQUERY_PRUNI : enable the use of subquery predicates with MVs to
NG_MV_ENABLED perform pruning

_SUBQUERY_PRUNI : subquery pruning reduction factor
NG_REDUCTION

_SUPPRESS_IDENT : supress owner index name err msg
IFIERS_ON_DUPKE
Y

_SWITCHOVER_TIM : Switchover timeout in minutes
EOUT

_SWITCHOVER_TO_ : option for graceful switchover to standby
STANDBY_OPTION

_SWITCHOVER_TO_ : Switchover to standby switches log for open redo
STANDBY_SWITCH_ threads
LOG

_SWITCH_CURRENT : switch current uses scan scn
_SCAN_SCN

_SWRF_METRIC_FR : Enable/disable SWRF Metric Frequent Mode Collection
EQUENT_MODE

_SWRF_MMON_DBFU : Enable/disable SWRF MMON DB Feature Usage
S

_SWRF_MMON_FLUS : Enable/disable SWRF MMON FLushing
H

_SWRF_MMON_METR : Enable/disable SWRF MMON Metrics Collection
ICS

_SWRF_ON_DISK_E : Parameter to enable/disable SWRF
NABLED

_SWRF_TEST_ACTI : test action parameter for SWRF
ON

_SWRF_TEST_DBFU : Enable/disable DB Feature Usage Testing
S

_SYNC_PRIMARY_W : wait time for alter session sync with primary
AIT_TIME

_SYNONYM_REPOIN : whether to trace metadata comparisons for synonym
T_TRACING repointing

_SYSAUX_TEST_PA : test parameter for SYSAUX
RAM

_SYSTEM_API_INT : enable debug tracing for system api interception
ERCEPTION_DEBUG

_SYSTEM_INDEX_C : optimizer percent system index caching
ACHING

_SYSTEM_TRIG_EN : are system triggers enabled
ABLED

_SYS_LOGON_DELA : failed logon delay for sys
Y

_TABLESPACES_PE : estimated number of tablespaces manipulated by each
R_TRANSACTION transaction

_TABLE_LOOKUP_P : table lookup prefetch vector size
REFETCH_SIZE

_TABLE_LOOKUP_P : table lookup prefetch threshold
REFETCH_THRESH

_TABLE_SCAN_COS : bump estimated full table scan and index ffs cost by
T_PLUS_ONE one

_TARGET_LOG_WRI : Do log write if this many redo blocks in buffer
TE_SIZE (auto=0)

_TARGET_LOG_WRI : How long LGWR will wait for redo to accumulate (csecs)
TE_SIZE_TIMEOUT

_TARGET_RBA_MAX : target rba max log lag percentage
_LAG_PERCENTAGE

_TA_LNS_WAIT_FO : LNS Wait time for arhcived version of online log
R_ARCH_LOG

_TDB_DEBUG_MODE : set debug mode for testing transportable database
_TEMP_TRAN_BLOC : number of blocks for a dimension before we temp
K_THRESHOLD transform

_TEMP_TRAN_CACH : determines if temp table is created with cache option
E

_TEMP_UNDO_DISA : is temp undo disabled on ADG
BLE_ADG

_TENTH_SPARE_PA : tenth spare parameter – integer
RAMETER

_TEST_HM_EXTENT : heatmap related – to be used by oracle dev only
_MAP

_TEST_KSUSIGSKI : test the function ksusigskip
P

_TEST_PARAM_1    : test parmeter 1 – integer
_TEST_PARAM_2    : test parameter 2 – string
_TEST_PARAM_3    : test parameter 3 – string
_TEST_PARAM_4    : test parameter 4 – string list
_TEST_PARAM_5    : test parmeter 5 – deprecated integer
_TEST_PARAM_6    : test parmeter 6 – size (ub8)
_TEST_PARAM_7    : test parameter 7 – big integer list
_TEST_PARAM_8    : test parameter 8 – cdb tests
_THIRD_SPARE_PA : third spare parameter – integer
RAMETER

_THIRTEENTH_SPA : thirteenth spare parameter – integer
RE_PARAMETER

_THREAD_STATE_C : Thread state change timeout for PnP instance (in sec)
HANGE_TIMEOUT_P
NP

_THRESHOLD_ALER : if 1, issue threshold-based alerts
TS_ENABLE

_TIMEMODEL_COLL : enable timemodel collection
ECTION

_TIMEOUT_ACTION : enables or disables KSU timeout actions
S_ENABLED

_TIMER_PRECISIO : VKTM timer precision in milli-sec
N

_TIME_BASED_RCV : time-based incremental recovery checkpoint target in
_CKPT_TARGET sec

_TIME_BASED_RCV : time-based incremental recovery file header update
_HDR_UPDATE_INT interval in sec
ERVAL

_TOTAL_LARGE_EX : Total memory for allocating large extents
TENT_MEMORY

_TQ_DUMP_PERIOD : time period for duping of TQ statistics (s)
_TRACE_BUFFERS : trace buffer sizes per process
_TRACE_BUFFER_W : trace buffer busy wait timeouts
AIT_TIMEOUTS

_TRACE_DUMP_ALL : if TRUE on error buckets of all processes will be
_PROCS dumped to the current trace file

_TRACE_DUMP_CLI : if TRUE dump client (ie. non-kst) buckets
ENT_BUCKETS

_TRACE_DUMP_CUR : if TRUE on error just dump our process bucket
_PROC_ONLY

_TRACE_DUMP_STA : if TRUE filter trace dumps to always loaded dlls
TIC_ONLY

_TRACE_EVENTS : trace events enabled at startup
_TRACE_FILES_PU : Create publicly accessible trace files
BLIC

_TRACE_KQLIDP : trace kqlidp0 operation
_TRACE_KTFS : Trace ILM Stats Tracking
_TRACE_KTFS_MEM : Debug memleak
_TRACE_NAVIGATI : enabling trace navigation linking
ON_SCOPE

_TRACE_PIN_TIME : trace how long a current pin is held
_TRACE_POOL_SIZ : trace pool size in bytes
E

_TRACE_PROCESSE : enable KST tracing in process
S

_TRACE_TEMP : Trace Tempspace Management
_TRACE_VIRTUAL_ : trace virtual columns exprs
COLUMNS

_TRACK_METRICS_ : Enable/disable Metrics Memory Tracking
MEMORY

_TRANSACTION_AU : transaction auditing records generated in the redo log
DITING

_TRANSACTION_RE : max number of parallel recovery slaves that may be used
COVERY_SERVERS

_TRANSIENT_LOGI : clear KCCDI2HMRP flag during standby recovery
CAL_CLEAR_HOLD_
MRP_BIT

_TRUNCATE_OPTIM : do truncate optimization if set to TRUE
IZATION_ENABLED

_TSENC_OBFUSCAT : Encryption key obfuscation in memory
E_KEY

_TSENC_TRACING : Enable TS encryption tracing
_TSM_CONNECT_ST : TSM test connect string
RING

_TSM_DISABLE_AU : Disable TSM auto cleanup actions
TO_CLEANUP

_TSTZ_LOCALTIME : Should TTC not convert to LocalTime to preserve
_BYPASS Timestamp with Timezone values

_TTS_ALLOW_CHAR : allow plugging in a tablespace with an incompatible
SET_MISMATCH character set

_TWELFTH_SPARE_ : twelfth spare parameter – integer
PARAMETER

_TWENTIETH_SPAR : twentieth spare parameter – string
E_PARAMETER

_TWENTY-EIGHTH_ : twenty-eighth spare parameter – boolean
SPARE_PARAMETER

_TWENTY-FIFTH_S : twenty-fifth spare parameter – string list
PARE_PARAMETER

_TWENTY-FIRST_S : twenty-first spare parameter – string list
PARE_PARAMETER

_TWENTY-FOURTH_ : twenty-fourth spare parameter – string list
SPARE_PARAMETER

_TWENTY-SECOND_ : twenty-second spare parameter – string list
SPARE_PARAMETER

_TWENTY-SEVENTH : twenty-seventh spare parameter – boolean
_SPARE_PARAMETE
R

_TWENTY-SIXTH_S : twenty-sixth spare parameter – boolean
PARE_PARAMETER

_TWENTY-THIRD_S : twenty-third spare parameter – string list
PARE_PARAMETER

_TWO_PASS : enable two-pass thread recovery
_TWO_PASS_REVER : uses two-pass reverse polish alg. to generate canonical
SE_POLISH_ENABL forms
ED

_TXN_CONTROL_TR : size the in-memory buffer size of txn control
ACE_BUF_SIZE

_UGA_CGA_LARGE_ : UGA/CGA large extent size
EXTENT_SIZE

_ULTRAFAST_LATC : maintain fast-path statistics for ultrafast latches
H_STATISTICS

_UNDO_AUTOTUNE : enable auto tuning of undo_retention
_UNDO_BLOCK_COM : enable undo block compression
PRESSION

_UNDO_DEBUG_MOD : debug flag for undo related operations
E

_UNDO_DEBUG_USA : invoke undo usage functions for testing
GE

_UNIFIED_AUDIT_ : Unified Audit SGA Queue Flush Interval
FLUSH_INTERVAL

_UNIFIED_AUDIT_ : Unified Audit SGA Queue Flush Threshold
FLUSH_THRESHOLD

_UNIFIED_AUDIT_ : Disable Default Unified Audit Policies on DB Create
POLICY_DISABLED

_UNION_REWRITE_ : expand queries with GSets into UNIONs for rewrite
FOR_GS

_UNNEST_SUBQUER : enables unnesting of complex subqueries
Y

_UNUSED_BLOCK_C : enable unused block compression
OMPRESSION

_UPDATE_DATAFIL : user requested update of datafile headers of locally
E_HEADERS_WITH_ managed datafiles with space information
SPACE_INFORMATI
ON

_UPDDEL_DBA_HAS : controls masking of lower order bits in DBA
H_MASK_BITS

_USE_ADAPTIVE_L : Adaptively switch between post/wait and polling
OG_FILE_SYNC

_USE_BEST_FIT : use best fit to allocate space
_USE_COLUMN_STA : enable the use of column statistics for DDP functions
TS_FOR_FUNCTION

_USE_FIPS_MODE : Enable use of crypographic libraries in FIPS mode
_USE_HIDDEN_PAR : use hidden partitions
TITIONS

_USE_HYBRID_ENC : Enable platform optimized encryption in hybrid mode
RYPTION_MODE

_USE_ISM : Enable Shared Page Tables – ISM
_USE_ISM_FOR_PG : Use ISM for allocating large extents
A

_USE_NOSEGMENT_ : use nosegment indexes in explain plan
INDEXES

_USE_PLATFORM_C : Enable platform optimized compression implementation
OMPRESSION_LIB

_USE_PLATFORM_E : Enable platform optimized encryption implementation
NCRYPTION_LIB

_USE_REALFREE_H : use real-free based allocator for PGA memory
EAP

_USE_SEQ_PROCES : whether to use process local seq cache
S_CACHE

_USE_SINGLE_LOG : Use a single process for redo log writing
_WRITER

_USE_VECTOR_POS : use vector post
T

_USE_ZERO_COPY_ : Should network vector IO interface be used for data
IO transfer

_UTLMMIG_TABLE_ : enable/disable utlmmig table stats gathering at upgrade
STATS_GATHERING

_UTS_FIRST_SEGM : Should we retain the first trace segment
ENT_RETAIN

_UTS_FIRST_SEGM : Maximum size (in bytes) of first segments
ENT_SIZE

_UTS_TRACE_DISK : Trace disk threshold parameter
_THRESHOLD

_UTS_TRACE_SEGM : Maximum number of trace segments
ENTS

_UTS_TRACE_SEGM : Maximum size (in bytes) of a trace segment
ENT_SIZE

_VALIDATE_FLASH : Scan database to validate result of flashback database
BACK_DATABASE

_VALIDATE_METRI : Enable/disable SGA Metric Structure validation
C_GROUPS

_VALIDATE_READM : validate redo blocks read from in-memory log buffer
EM_REDO

_VENDOR_LIB_LOC : Vendor library search root directory
_VERIFY_FG_LOG_ : LGWR verifies redo checksums generated by foreground
CHECKSUM processes

_VERIFY_FLASHBA : Verify that the redo logs needed for flashback are
CK_REDO available

_VERIFY_UNDO_QU : TRUE – verify consistency of undo quota statistics
OTA

_VERY_LARGE_OBJ : upper threshold level of object size for direct reads
ECT_THRESHOLD

_VERY_LARGE_PAR : very_large_partitioned_table
TITIONED_TABLE

_VIRTUAL_COLUMN : overload virtual columns expression
_OVERLOAD_ALLOW
ED

_VKRM_SCHEDULE_ : VKRM scheduling interval
INTERVAL

_VKTM_ASSERT_TH : soft assert threshold VKTM timer drift
RESH

_WAIT_BREAKUP_T : Wait breakup threshold (in centiseconds)
HRESHOLD_CSECS

_WAIT_BREAKUP_T : Wait breakup time (in centiseconds)
IME_CSECS

_WAIT_FOR_SYNC : wait for sync on commit MUST BE ALWAYS TRUE
_WAIT_SAMPLES_M : Wait Samples maximum sections
AX_SECTIONS

_WAIT_SAMPLES_M : Wait Samples maximum time in seconds
AX_TIME_SECS

_WAIT_TRACKER_I : Wait Tracker number of seconds per interval
NTERVAL_SECS

_WAIT_TRACKER_N : Wait Tracker number of intervals
UM_INTERVALS

_WAIT_YIELD_HP_ : Wait Yield – High Priority Mode
MODE

_WAIT_YIELD_MOD : Wait Yield – Mode
E

_WAIT_YIELD_SLE : Wait Yield – Sleep Frequency
EP_FREQ

_WAIT_YIELD_SLE : Wait Yield – Sleep Time (in milliseconds)
EP_TIME_MSECS

_WAIT_YIELD_YIE : Wait Yield – Yield Frequency
LD_FREQ

_WALK_INSERT_TH : maximum number of unusable blocks to walk across
RESHOLD freelist

_WATCHPOINT_ON : is the watchpointing feature turned on?
_WCR_CONTROL : Oracle internal test WCR parameter used ONLY for
testing!

_WCR_GRV_CACHE_ : Oracle internal: Set the replay cache size for
SIZE WRR$_REPLAY_DATA.

_WCR_SEQ_CACHE_ : Oracle internal: Set the replay cache size for
SIZE WRR$_REPLAY_SEQ_DATA.

_WIDETAB_COMP_E : wide table compression enabled
NABLED

_WINDOWFUNC_OPT : settings for window function optimizations
IMIZATION_SETTI
NGS

_WITH_SUBQUERY : WITH subquery transformation
_WRITE_CLONES : write clones flag
_XA_INTERNAL_RE : number of internal retries for xa transactions
TRIES

_XDS_MAX_CHILD_ : Maximum number of XDS user-specific child cursors
CURSORS

_XENGEM_DEVNAME : override default VM GEM device name used by skgvm
_XENGEM_DIAGMOD : set to OFF to disable VM GEM support and
E functionalities

_XENGEM_ENABLED : Enable OVM GEM support
_XPL_PEEKED_BIN : maximum bytes for logging peeked bind values for
DS_LOG_SIZE V$SQL_PLAN (0 = OFF)

_XPL_TRACE : Explain Plan tracing parameter
_XSOLAPI_AUTO_M : OLAP API lower bound for auto materialization.
ATERIALIZATION_
BOUND

_XSOLAPI_AUTO_M : OLAP API behavior for auto materialization
ATERIALIZATION_
TYPE

_XSOLAPI_BUILD_ : OLAP API output build info to trace file
TRACE

_XSOLAPI_DEBUG_ : OLAP API debug output disposition
OUTPUT

_XSOLAPI_DENSIF : OLAP API cube densification
Y_CUBES

_XSOLAPI_DIMENS : OLAP API symmetric overfetch
ION_GROUP_CREAT
ION

_XSOLAPI_DML_TR : OLAP API output dml commands and expressions to trace
ACE file

_XSOLAPI_FETCH_ : OLAP API fetch type
TYPE

_XSOLAPI_FIX_VP : OLAP API Enable vptr fixing logic in shared server mode
TRS

_XSOLAPI_GENERA : OLAP API generates WITH clause?
TE_WITH_CLAUSE

_XSOLAPI_HIERAR : OLAP API hierarchy value type
CHY_VALUE_TYPE

_XSOLAPI_LOAD_A : When to load OLAP API library at server process start
T_PROCESS_START

_XSOLAPI_MATERI : OLAP API min number of rows required to use rowcache in
ALIZATION_ROWCA query materialization
CHE_MIN_ROWS_FO
R_USE

_XSOLAPI_MATERI : OLAP API Enable source materialization
ALIZE_SOURCES

_XSOLAPI_METADA : OLAP API metadata reader mode
TA_READER_MODE

_XSOLAPI_ODBO_M : OLAP API uses ODBO mode?
ODE

_XSOLAPI_OPTIMI : OLAP API optimizes suppressions?
ZE_SUPPRESSION

_XSOLAPI_OPT_AW : OLAP API enables AW position and count optimization?
_POSITION

_XSOLAPI_PRECOM : OLAP API precomputes subqueries?
PUTE_SUBQUERY

_XSOLAPI_REMOVE : OLAP API removes columns for materialization?
_COLUMNS_FOR_MA
TERIALIZATION

_XSOLAPI_SET_NL : OLAP API sets NLS?
S

_XSOLAPI_SHARE_ : OLAP API share executors?
EXECUTORS

_XSOLAPI_SOURCE : OLAP API output Source definitions to trace file
_TRACE

_XSOLAPI_SQL_AL : OLAP API multi-join non-base hints
L_MULTI_JOIN_NO
N_BASE_HINTS

_XSOLAPI_SQL_AL : OLAP API non-base hints
L_NON_BASE_HINT
S

_XSOLAPI_SQL_AU : OLAP API enable automatic dimension hints
TO_DIMENSION_HI
NTS

_XSOLAPI_SQL_AU : OLAP API enable automatic measure hints
TO_MEASURE_HINT
S

_XSOLAPI_SQL_DI : OLAP API dimension hints
MENSION_HINTS

_XSOLAPI_SQL_EN : OLAP API enables AW join?
ABLE_AW_JOIN

_XSOLAPI_SQL_EN : OLAP API enables AW QDR merge?
ABLE_AW_QDR_MER
GE

_XSOLAPI_SQL_HI : OLAP API generic hints
NTS

_XSOLAPI_SQL_ME : OLAP API measure hints
ASURE_HINTS

_XSOLAPI_SQL_MI : OLAP API SQL MINUS threshold
NUS_THRESHOLD

_XSOLAPI_SQL_OP : OLAP API enable optimization
TIMIZE

_XSOLAPI_SQL_PR : OLAP API prepare statement cache size
EPARE_STMT_CACH
E_SIZE

_XSOLAPI_SQL_RE : OLAP API enable remove unused columns optimizations
MOVE_COLUMNS

_XSOLAPI_SQL_RE : OLAP API result set cache size
SULT_SET_CACHE_
SIZE

_XSOLAPI_SQL_SY : OLAP API enable symmetric predicate for dimension
MMETRIC_PREDICA groups
TE

_XSOLAPI_SQL_TO : OLAP API top dimension hints
P_DIMENSION_HIN
TS

_XSOLAPI_SQL_TO : OLAP API top measure hints
P_MEASURE_HINTS

_XSOLAPI_SQL_US : OLAP API enable bind variables optimization
E_BIND_VARIABLE
S

_XSOLAPI_STRING : OLAP API stringifies order levels?
IFY_ORDER_LEVEL
S

_XSOLAPI_SUPPOR : OLAP API MTM mapping classes supported?
T_MTM

_XSOLAPI_SUPPRE : OLAP API suppression AW mask threshold
SSION_AW_MASK_T
HRESHOLD

_XSOLAPI_SUPPRE : OLAP API suppression chunk size
SSION_CHUNK_SIZ
E

_XSOLAPI_USE_MO : OLAP API uses models?
DELS

_XSOLAPI_USE_OL : OLAP API uses OLAP DML?
AP_DML

_XSOLAPI_USE_OL : OLAP API uses OLAP DML for rank?
AP_DML_FOR_RANK

_XS_CLEANUP_TAS : Triton Session Cleanup
K

_XS_DISPATCHER_ : XS dispatcher only mode
ONLY

_XTBUFFER_SIZE : buffer size in KB needed for populate/query operation
_XTTS_ALLOW_PRE : allow cross platform for pre10 compatible tablespace
10

_XTTS_SET_PLATF : set cross platform info during file header read
ORM_INFO

_XT_COVERAGE : external tables code coverage parameter
_XT_TRACE : external tables trace parameter
_ZONEMAP_CONTRO : control different uses/algorithms related to zonemaps
L

_ZONEMAP_STALEN : control the staleness tracking of zonemaps via trigger
ESS_TRACKING

_ZONEMAP_USE_EN : enable the use of zonemaps for IO pruning
ABLED

__DATA_TRANSFER : Actual size of data transfer cache
_CACHE_SIZE

__DB_CACHE_SIZE : Actual size of DEFAULT buffer pool for standard block
size buffers

__DG_BROKER_SER : service names for broker use
VICE_NAMES

__JAVA_POOL_SIZ : Actual size in bytes of java pool
E

__LARGE_POOL_SI : Actual size in bytes of large pool
ZE

__ORACLE_BASE : ORACLE_BASE
__PGA_AGGREGATE : Current target size for the aggregate PGA memory
_TARGET consumed

__SGA_TARGET : Actual size of SGA
__SHARED_IO_POO : Actual size of shared IO pool
L_SIZE

__SHARED_POOL_S : Actual size in bytes of shared pool
IZE

__STREAMS_POOL_ : Actual size in bytes of streams pool
SIZE

2984 rows selected.

References: Oracle Documentation

Oracle12c版本中未歸檔隱藏引數

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