01, 查看表
SQL> select * from tab where TNAME='T'; TNAME TABTYPE -------------------------------------------------------------------------------------------------------------------------------- ------ T TABLE
02,数据块位置定位
SQL> select SEGMENT_NAME,TABLESPACE_NAME,HEADER_FILE,HEADER_BLOCK from dba_segments where SEGMENT_NAME='T'; SEGMENT_NAME TABLESPACE_NAME HEADER_FILE HEADER_BLOCK --------------- ------------------------------ ----------- ------------ T SYSTEM 1 103800
SQL> select owner from dba_extents where SEGMENT_NAME='T'; OWNER -------------------------------------------------------------------------------------------------------------------------------- SYS
SQL> select a.file_id,a.block_id,a.blocks,b.name from dba_extents a,v$datafile b where a.file_id=b.file# and a.owner='SYS' and a.segment_name='T'; FILE_ID BLOCK_ID BLOCKS NAME ---------- ---------- ---------- -------------------------------------------------------------------------------------------------------------------------- 1 103800 8 /orcl/app/oracle/oradata/orcl/system01.dbf
03,dump 数据块
SQL> alter system dump datafile 1 block 103800; System altered.
--查看dump位置 SQL> show parameters dump; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ background_core_dump string partial background_dump_dest string /orcl/app/oracle/product/12.1. 0/db_1/rdbms/log core_dump_dest string /orcl/app/oracle/diag/rdbms/no de12c01/orcl/cdump max_dump_file_size string unlimited shadow_core_dump string partial user_dump_dest string /orcl/app/oracle/product/12.1. 0/db_1/rdbms/log --查看位置号 SQL> select p.spid from v$session s,v$process p where s.paddr=p.addr and s.sid in (select userenv('sid') from dual); SPID ------------------------ 30291 --查看位置 SQL> select '!vi ' || d.VALUE || '/' || LOWER (RTRIM (i.INSTANCE, CHR (0))) || '_ora_' || p.spid || '.trc' trace_file_name FROM (select p.spid FROM v$mystat m, v$session s, v$process p WHERE m.statistic# = 1 AND s.SID = m.SID AND p.addr = s.paddr) p, (select t.INSTANCE FROM v$thread t, v$parameter v WHERE v.NAME = 'thread' AND (v.VALUE = 0 OR t.thread# = TO_NUMBER (v.VALUE))) i, (select value from v$parameter where name = 'user_dump_dest') d / TRACE_FILE_NAME ----------------------------------------------------------------------------------------------------- !vi /orcl/app/oracle/product/12.1.0/db_1/rdbms/log/orcl_ora_30291.trc
04,寻找
理论上上面操作位置成立的但实际上,进去找不到,有点你难受
万能的查找方法,对这个数据的操作日志都全在了
[root@node12c01 log]# find / -name "*30291*" /proc/30291 /proc/30291/task/30291 /orcl/app/oracle/diag/rdbms/node12c01/orcl/trace/orcl_ora_30291.trc /orcl/app/oracle/diag/rdbms/node12c01/orcl/trace/orcl_ora_30291.trm /orcl/app/oracle/admin/orcl/adump/orcl_ora_30291_20190416033909817727143795.aud
查看的内容:
[root@node12c01 adump]# ll /orcl/app/oracle/diag/rdbms/node12c01/orcl/trace/orcl_ora_30291.trc -rw-r----- 1 oracle oinstall 4356 Apr 16 03:45 /orcl/app/oracle/diag/rdbms/node12c01/orcl/trace/orcl_ora_30291.trc [root@node12c01 adump]# more /orcl/app/oracle/diag/rdbms/node12c01/orcl/trace/orcl_ora_30291.trc Trace file /orcl/app/oracle/diag/rdbms/node12c01/orcl/trace/orcl_ora_30291.trc Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production Build label: RDBMS_12.2.0.1.0_LINUX.X64_170125 ORACLE_HOME: /orcl/app/oracle/product/12.1.0/db_1 System name: Linux Node name: node12c01 Release: 3.10.0-693.el7.x86_64 Version: #1 SMP Tue Aug 22 21:09:27 UTC 2017 Machine: x86_64 Instance name: orcl Redo thread mounted by this instance: 1 Oracle process number: 36 Unix process pid: 30291, image: oracle@node12c01 (TNS V1-V3) *** 2019-04-16T03:45:59.833889-04:00 (CDB$ROOT(1)) *** SESSION ID:(31.13469) 2019-04-16T03:45:59.833923-04:00 *** CLIENT ID:() 2019-04-16T03:45:59.833928-04:00 *** SERVICE NAME:(SYS$USERS) 2019-04-16T03:45:59.833933-04:00 *** MODULE NAME:(sqlplus@node12c01 (TNS V1-V3)) 2019-04-16T03:45:59.833937-04:00 *** ACTION NAME:() 2019-04-16T03:45:59.833941-04:00 *** CLIENT DRIVER:(SQL*PLUS) 2019-04-16T03:45:59.833945-04:00 *** CONTAINER ID:(1) 2019-04-16T03:45:59.833949-04:00 Start dump data blocks tsn: 0 file#:1 minblk 103800 maxblk 103800 Block dump from cache: Dump of buffer cache at level 4 for pdb=1 tsn=0 rdba=4298104 BH (0xcfff2998) file#: 1 rdba: 0x00419578 (1/103800) class: 4 ba: 0xcfeca000 set: 6 pool: 3 bsz: 8192 bsi: 0 sflg: 2 pwc: 0,0 dbwrid: 0 obj: 75220 objn: 75220 tsn: [1/0] afn: 1 hint: f hash: [0x7a4dee48,0x7a4dee48] lru: [0xe6fa20b8,0xe6fa19d8] ckptq: [NULL] fileq: [NULL] objq: [0x91105108,0x7ffdc260] objaq: [0x911050f8,0x7ffdc270] st: XCURRENT md: NULL fpin: 'ktewh25: kteinicnt' fscn: 0x3b0593 tch: 23 flags: block_written_once LRBA: [0x0.0.0] LSCN: [0x0] HSCN: [0x4ea6cf] HSUB: [238] Printing buffer operation history (latest change first): cnt: 1 01. sid:06 L192:kcbbic2:bic:FBD 02. sid:06 L191:kcbbic2:bic:FBW 03. sid:06 L602:bic1_int:bis:FWC 04. sid:06 L822:bic1_int:ent:rtn 05. sid:06 L832:oswmqbg1:clr:WRT 06. sid:06 L930:kubc:sw:mq 07. sid:06 L913:bxsv:sw:objq 08. sid:06 L608:bxsv:bis:FBW 09. sid:06 L607:bxsv:bis:FFW 10. sid:12 L464:chg1_mn:bic:FMS 11. sid:12 L778:chg1_mn:bis:FMS 12. sid:12 L353:gcur:set:MEXCL 13. sid:12 L353:gcur:set:MEXCL 14. sid:12 L464:chg1_mn:bic:FMS 15. sid:12 L778:chg1_mn:bis:FMS 16. sid:12 L353:gcur:set:MEXCL Block dump from disk: buffer tsn: 0 rdba: 0x00419578 (1/103800) scn: 0x4ea6cf seq: 0x02 flg: 0x04 tail: 0xa6cf1002 frmt: 0x02 chkval: 0x5692 type: 0x10=DATA SEGMENT HEADER - UNLIMITED Hex dump of block: st=0, typ_found=1 Dump of memory from 0x00007F12ACAA4000 to 0x00007F12ACAA6000 7F12ACAA4000 0000A210 00419578 004EA6CF 04020000 [....x.A...N.....] 7F12ACAA4010 00005692 00000000 00000000 00000000 [.V..............] 7F12ACAA4020 00000000 00000001 00000007 00001020 [............ ...] 7F12ACAA4030 00000000 00000003 00000007 0041957C [............|.A.] 7F12ACAA4040 00000000 00000000 00000001 00000003 [................] 7F12ACAA4050 00000000 00000000 00000000 00000001 [................] 7F12ACAA4060 00000000 000125D4 40000000 00419579 [.....%[email protected].] 7F12ACAA4070 00000007 00000000 00000000 00000000 [................] 7F12ACAA4080 00000000 00000000 00000000 00000000 [................] Repeat 250 times 7F12ACAA5030 00000000 00010000 00010001 00000001 [................] 7F12ACAA5040 00000000 00000003 0041957B 0041957B [........{.A.{.A.] 7F12ACAA5050 00000000 00000000 00000000 00000000 [................] Repeat 249 times 7F12ACAA5FF0 00000000 00000000 00000000 A6CF1002 [................] Extent Control Header ----------------------------------------------------------------- Extent Header:: spare1: 0 spare2: 0 #extents: 1 #blocks: 7 last map 0x00000000 #maps: 0 offset: 4128 Highwater:: 0x0041957c ext#: 0 blk#: 3 ext size: 7 #blocks in seg. hdr's freelists: 1 #blocks below: 3 mapblk 0x00000000 offset: 0 Unlocked Map Header:: next 0x00000000 #extents: 1 obj#: 75220 flag: 0x40000000 Extent Map ----------------------------------------------------------------- 0x00419579 length: 7 nfl = 1, nfb = 1 typ = 1 nxf = 0 ccnt = 3 SEG LST:: flg: USED lhd: 0x0041957b ltl: 0x0041957b End dump data blocks tsn: 0 file#: 1 minblk 103800 maxblk 103800