Oracle常用dump命令，記錄一下備查。
一.Memory Dumps
1).Global Area
ALTER SESSION SET EVENTS ‘immediate trace name global_area level n’;
1 包含PGA
2 包含SGA
4 包含UGA
8 包含indrect memory
2).Library Cache
ALTER SESSION SET EVENTS ‘immediate trace name library_cache level n’;
1 library cache統計資訊
2 包含hash table histogram
3 包含object handle
4 包含object結構（Heap 0）
3).Row Cache
ALTER SESSION SET EVENTS ‘immediate trace name row_cache level n’;
1 row cache統計資訊
2 包含hash table histogram
8 包含object結構
4).Buffers
ALTER SESSION SET EVENTS ‘immediate trace name buffers level n’;
1 buffer header
2 level 1 + block header
3 level 2 + block contents
4 level 1 + hash chain
5 level 2 + hash chain
6 level 3 + hash chain
8 level 4 + users/waiters
9 level 5 + users/waiters
10 level 6 + users/waiters
5).Buffer
ALTER SESSION SET EVENTS ‘immediate trace name buffer level n’;
n為某個指定block的rdba，該命令可以轉儲某個block在buffer中的所有版本。
6).Heap
ALTER SESSION SET EVENTS ‘immediate trace name heapdump level level’;
1 PGA摘要
2 SGA摘要
4 UGA摘要
8 Current call(CGA)摘要
16 User call(CGA)摘要
32 Large call(LGA)摘要
1025 PGA內容
2050 SGA內容
4100 UGA內容
8200 Current call內容
16400 User call內容
32800 Large call內容
7).Sub Heap
Oracle 9.0.1版本之前
ALTER SESSION SET EVENTS ‘immediate trace name heapdump_addr level n’;
若n為subheap的地址，轉儲的是subheap的摘要資訊
若n為subheap的地址+1，轉儲的則是subheap的內容
Oracle 9.2.0版本之後
ALTER SESSION SET EVENTS ‘immediate trace name heapdump_addr level n, addr m’;
其中m為subheap的地址
n為1轉儲subheap的摘要，n為2轉儲subheap的內容
8).Process State
ALTER SESSION SET EVENTS ‘immediate trace name processstate level n’;
9).System State
ALTER SESSION SET EVENTS ‘immediate trace name systemstate level n’;
10).Error State
ALTER SESSION SET EVENTS ‘immediate trace name errorstack level n’;
0 Error stack
1 level 0 + function call stack
2 level 1 + process state
3 level 2 + context area
11).Hang Analysis
ALTER SESSION SET EVENTS ‘immediate trace name hanganalyze level n’;
12).Work Area
ALTER SESSION SET EVENTS ‘immediate trace name workareatab_dump level n’;
1 SGA資訊
2 Workarea Table摘要資訊
3 Workarea Table詳細資訊
13).Latches
ALTER SESSION SET EVENTS ‘immediate trace name latches level n’;
1 latch資訊
2 統計資訊
14).Events
ALTER SESSION SET EVENTS ‘immediate trace name events level n’;
1 session
2 process
3 system
15).Locks
ALTER SESSION SET EVENTS ‘immediate trace name locks level n’;
16).Shared Server Process
ALTER SESSION SET EVENTS ‘immediate trace name shared_server_state level n’;
n取值為1~14
17).Background Messages
ALTER SESSION SET EVENTS ‘immediate trace name bg_messages level n’;
n為pid+1
二.File Dumps
1).Block
Oracle 7之前
ALTER SESSION SET EVENTS ‘immediate trace name blockdump level n’;
n為block的rdba
Oracle8以後
ALTER SYSTEM DUMP DATAFILE file# BLOCK block#;
ALTER SYSTEM DUMP DATAFILE file#
BLOCK MIN minimum_block#
BLOCK MAX maximum_block#;
2).Tree Dump
ALTER SESSION SET EVENTS ‘immediate trace name treedump level n’;
n為object_id
3).Undo Segment Header
ALTER SYSTEM DUMP UNDO_HEADER ‘segment_name’;
4).Undo for a Transaction
ALTER SYSTEM DUMP UNDO BLOCK ‘segment_name’ XID xidusn xidslot xidsqn;
5).File Header
ALTER SESSION SET EVENTS ‘immediate trace name file_hdrs level n’;
1 控制檔案中的檔案頭資訊
2 level 1 + 檔案頭資訊
3 level 2 + 資料檔案頭資訊
10 level 3
6).Control file
ALTER SESSION SET EVENTS ‘immediate trace name controlf level n’;
1 檔案頭資訊
2 level 1 + 資料庫資訊 + 檢查點資訊
3 level 2 + 可重用節資訊
10 level 3
7).Redo log Header
ALTER SESSION SET EVENTS ‘immediate trace name redohdr level n’;
1 控制檔案中的redo log資訊
2 level 1 + 檔案頭資訊
3 level 2 + 日誌檔案頭資訊
10 level 3
8).Redo log
ALTER SYSTEM DUMP LOGFILE ‘FileName’;
ALTER SYSTEM DUMP LOGFILE ‘FileName’
SCN MIN MinimumSCN
SCN MAX MaximumSCN
TIME MIN MinimumTime
TIME MAX MaximumTime
LAYER Layer
OPCODE Opcode
DBA MIN FileNumber . BlockNumber
DBA MAX FileNumber . BlockNumber
RBA MIN LogFileSequenceNumber . BlockNumber
RBA MAX LogFileSequenceNumber . BlockNumber;
其中time = (((((yyyy – 1988)) * 12 + mm – 1) * 31 + dd – 1) * 24 + hh) * 60 + mi) * 60 + ss;
9).Loghist
ALTER SESSION SET EVENTS ‘immediate trace name loghist level n’;
1 dump控制檔案中最早和最遲的日誌歷史項
1 dump 2^n個日誌歷史項