[20140812]oracle12c dbms_stats的預設引數
[20140812]oracle 12c. dbms_stats的預設引數.txt
--昨天,別人講我寫的連結依舊漏掉寶dbms_stats的預設引數,今天看了一下,確實如此,寫一個比較全面的,
--實際上這些值儲存在SYS.OPTSTAT_HIST_CONTROL$中.
--連結:
http://blog.itpub.net/267265/viewspace-773277/
直接查詢它就ok了.
SYS@test> select sname, sval1,spare1, spare4 from sys.OPTSTAT_HIST_CONTROL$ order by sname;
SNAME | SVAL1| SPARE1|SPARE4
------------------------------|----------|----------|----------------------------------------
APPROXIMATE_NDV | | 1|TRUE
AUTOSTATS_TARGET | | 1|AUTO
CASCADE | | 1|DBMS_STATS.AUTO_CASCADE
CONCURRENT | | 1|OFF
DEBUG | | 1|0
DEGREE | | 1|NULL
ENABLE_HYBRID_HISTOGRAMS | | 1|3
ENABLE_TOP_FREQ_HISTOGRAMS | | 1|3
ESTIMATE_PERCENT | | 1|DBMS_STATS.AUTO_SAMPLE_SIZE
GATHER_AUTO | | 1|AFTER_LOAD
GLOBAL_TEMP_TABLE_STATS | | 1|SESSION
GRANULARITY | | 1|AUTO
INCREMENTAL | | 1|FALSE
INCREMENTAL_INTERNAL_CONTROL | | 1|TRUE
INCREMENTAL_LEVEL | | 1|PARTITION
INCREMENTAL_STALENESS | | 1|
JOB_OVERHEAD | | 1|-1
JOB_OVERHEAD_PERC | | 1|1
METHOD_OPT | | 1|FOR ALL COLUMNS SIZE AUTO
MON_MODS_ALL_UPD_TIME | | |
NO_INVALIDATE | | 1|DBMS_STATS.AUTO_INVALIDATE
OPTIONS | | 1|GATHER
PUBLISH | | 1|TRUE
SKIP_TIME | | |
SPD_RETENTION_WEEKS | | 1|53
STALE_PERCENT | | 1|10
STATS_RETENTION | 31| 1|
SYS_FLAGS | | |1
TABLE_CACHED_BLOCKS | | 1|1
TRACE | | 1|0
30 rows selected.
--注:STATS_RETENTION的預設值保持在SVAL1.SPARE1=1 表示SPARE4的值是oracle的預設引數,沒有改動過.
select 'select ' a from dual
union all
select * from (select 'DBMS_STATS.get_prefs ('''||sname||''') '||sname||',' a from sys.OPTSTAT_HIST_CONTROL$ order by sname)
union all
select '1 from dual ' from dual;
select
DBMS_STATS.get_prefs ('APPROXIMATE_NDV') APPROXIMATE_NDV,
DBMS_STATS.get_prefs ('AUTOSTATS_TARGET') AUTOSTATS_TARGET,
DBMS_STATS.get_prefs ('CASCADE') CASCADE,
DBMS_STATS.get_prefs ('CONCURRENT') CONCURRENT,
DBMS_STATS.get_prefs ('DEBUG') DEBUG,
DBMS_STATS.get_prefs ('DEGREE') DEGREE,
DBMS_STATS.get_prefs ('ENABLE_HYBRID_HISTOGRAMS') ENABLE_HYBRID_HISTOGRAMS,
DBMS_STATS.get_prefs ('ENABLE_TOP_FREQ_HISTOGRAMS') ENABLE_TOP_FREQ_HISTOGRAMS,
DBMS_STATS.get_prefs ('ESTIMATE_PERCENT') ESTIMATE_PERCENT,
DBMS_STATS.get_prefs ('GATHER_AUTO') GATHER_AUTO,
DBMS_STATS.get_prefs ('GLOBAL_TEMP_TABLE_STATS') GLOBAL_TEMP_TABLE_STATS,
DBMS_STATS.get_prefs ('GRANULARITY') GRANULARITY,
DBMS_STATS.get_prefs ('INCREMENTAL') INCREMENTAL,
DBMS_STATS.get_prefs ('INCREMENTAL_INTERNAL_CONTROL') INCREMENTAL_INTERNAL_CONTROL,
DBMS_STATS.get_prefs ('INCREMENTAL_LEVEL') INCREMENTAL_LEVEL,
DBMS_STATS.get_prefs ('INCREMENTAL_STALENESS') INCREMENTAL_STALENESS,
DBMS_STATS.get_prefs ('JOB_OVERHEAD') JOB_OVERHEAD,
DBMS_STATS.get_prefs ('JOB_OVERHEAD_PERC') JOB_OVERHEAD_PERC,
DBMS_STATS.get_prefs ('METHOD_OPT') METHOD_OPT,
DBMS_STATS.get_prefs ('MON_MODS_ALL_UPD_TIME') MON_MODS_ALL_UPD_TIME,
DBMS_STATS.get_prefs ('NO_INVALIDATE') NO_INVALIDATE,
DBMS_STATS.get_prefs ('OPTIONS') OPTIONS,
DBMS_STATS.get_prefs ('PUBLISH') PUBLISH,
DBMS_STATS.get_prefs ('SKIP_TIME') SKIP_TIME,
DBMS_STATS.get_prefs ('SPD_RETENTION_WEEKS') SPD_RETENTION_WEEKS,
DBMS_STATS.get_prefs ('STALE_PERCENT') STALE_PERCENT,
DBMS_STATS.get_prefs ('STATS_RETENTION') STATS_RETENTION,
DBMS_STATS.get_prefs ('SYS_FLAGS') SYS_FLAGS,
DBMS_STATS.get_prefs ('TABLE_CACHED_BLOCKS') TABLE_CACHED_BLOCKS,
DBMS_STATS.get_prefs ('TRACE') TRACE,
1 from dual
32 rows selected.
--執行如下:
select
DBMS_STATS.get_prefs ('APPROXIMATE_NDV') APPROXIMATE_NDV,
DBMS_STATS.get_prefs ('AUTOSTATS_TARGET') AUTOSTATS_TARGET,
DBMS_STATS.get_prefs ('CASCADE') CASCADE,
DBMS_STATS.get_prefs ('CONCURRENT') CONCURRENT,
DBMS_STATS.get_prefs ('DEBUG') DEBUG,
DBMS_STATS.get_prefs ('DEGREE') DEGREE,
DBMS_STATS.get_prefs ('ENABLE_HYBRID_HISTOGRAMS') ENABLE_HYBRID_HISTOGRAMS,
DBMS_STATS.get_prefs ('ENABLE_TOP_FREQ_HISTOGRAMS') ENABLE_TOP_FREQ_HISTOGRAMS,
DBMS_STATS.get_prefs ('ESTIMATE_PERCENT') ESTIMATE_PERCENT,
DBMS_STATS.get_prefs ('GATHER_AUTO') GATHER_AUTO,
DBMS_STATS.get_prefs ('GLOBAL_TEMP_TABLE_STATS') GLOBAL_TEMP_TABLE_STATS,
DBMS_STATS.get_prefs ('GRANULARITY') GRANULARITY,
DBMS_STATS.get_prefs ('INCREMENTAL') INCREMENTAL,
DBMS_STATS.get_prefs ('INCREMENTAL_INTERNAL_CONTROL') INCREMENTAL_INTERNAL_CONTROL,
DBMS_STATS.get_prefs ('INCREMENTAL_LEVEL') INCREMENTAL_LEVEL,
DBMS_STATS.get_prefs ('INCREMENTAL_STALENESS') INCREMENTAL_STALENESS,
DBMS_STATS.get_prefs ('JOB_OVERHEAD') JOB_OVERHEAD,
DBMS_STATS.get_prefs ('JOB_OVERHEAD_PERC') JOB_OVERHEAD_PERC,
DBMS_STATS.get_prefs ('METHOD_OPT') METHOD_OPT,
DBMS_STATS.get_prefs ('MON_MODS_ALL_UPD_TIME') MON_MODS_ALL_UPD_TIME,
DBMS_STATS.get_prefs ('NO_INVALIDATE') NO_INVALIDATE,
DBMS_STATS.get_prefs ('OPTIONS') OPTIONS,
DBMS_STATS.get_prefs ('PUBLISH') PUBLISH,
DBMS_STATS.get_prefs ('SKIP_TIME') SKIP_TIME,
DBMS_STATS.get_prefs ('SPD_RETENTION_WEEKS') SPD_RETENTION_WEEKS,
DBMS_STATS.get_prefs ('STALE_PERCENT') STALE_PERCENT,
DBMS_STATS.get_prefs ('STATS_RETENTION') STATS_RETENTION,
DBMS_STATS.get_prefs ('SYS_FLAGS') SYS_FLAGS,
DBMS_STATS.get_prefs ('TABLE_CACHED_BLOCKS') TABLE_CACHED_BLOCKS,
DBMS_STATS.get_prefs ('TRACE') TRACE,
1 from dual
Record View
As of: 2014/8/11 22:01:54
APPROXIMATE_NDV: TRUE
AUTOSTATS_TARGET: AUTO
CASCADE: DBMS_STATS.AUTO_CASCADE
CONCURRENT: OFF
DEBUG: 0
DEGREE: NULL
ENABLE_HYBRID_HISTOGRAMS: 3
ENABLE_TOP_FREQ_HISTOGRAMS: 3
ESTIMATE_PERCENT: DBMS_STATS.AUTO_SAMPLE_SIZE
GATHER_AUTO: AFTER_LOAD
GLOBAL_TEMP_TABLE_STATS: SESSION
GRANULARITY: AUTO
INCREMENTAL: FALSE
INCREMENTAL_INTERNAL_CONTROL: TRUE
INCREMENTAL_LEVEL: PARTITION
INCREMENTAL_STALENESS:
JOB_OVERHEAD: -1
JOB_OVERHEAD_PERC: 1
METHOD_OPT: FOR ALL COLUMNS SIZE AUTO
MON_MODS_ALL_UPD_TIME:
NO_INVALIDATE: DBMS_STATS.AUTO_INVALIDATE
OPTIONS: GATHER
PUBLISH: TRUE
SKIP_TIME:
SPD_RETENTION_WEEKS: 53
STALE_PERCENT: 10
STATS_RETENTION:
SYS_FLAGS: 1
TABLE_CACHED_BLOCKS: 1
TRACE: 0
1: 1
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/267265/viewspace-1249558/，如需轉載，請註明出處，否則將追究法律責任。
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