【Oracle】日常运维手册（下）

查找前十条性能差的SQL

SELECT *
FROM (SELECT PARSING_USER_ID EXECUTIONS,
SORTS,
COMMAND_TYPE,
DISK_READS,
SQL_TEXT
FROM V$SQLAREA
ORDER BY DISK_READS DESC)
WHERE ROWNUM

检查死锁

SELECT   bs.username "Blocking User", bs.username "DB User",
ws.username "Waiting User", bs.SID "SID", ws.SID "WSID",          bs.serial# "Serial#", bs.sql_address "address",
bs.sql_hash_value "Sql hash", bs.program "Blocking App",          ws.program "Waiting App", bs.machine "Blocking Machine",          ws.machine "Waiting Machine", bs.osuser "Blocking OS User",          ws.osuser "Waiting OS User", bs.serial# "Serial#",
ws.serial# "WSerial#",
DECODE (wk.TYPE,
'MR', 'Media Recovery',
'RT', 'Redo Thread',
'UN', 'USER Name',
'TX', 'Transaction',
'TM', 'DML',
'UL', 'PL/SQL USER LOCK',
'DX', 'Distributed Xaction',
'CF', 'Control FILE',
'IS', 'Instance State',
'FS', 'FILE SET',
'IR', 'Instance Recovery',
'ST', 'Disk SPACE Transaction',
'TS', 'Temp Segment',
'IV', 'Library Cache Invalidation',
'LS', 'LOG START OR Switch',
'RW', 'ROW Wait',
'SQ', 'Sequence Number',
'TE', 'Extend TABLE',
'TT', 'Temp TABLE',
wk.TYPE
) lock_type,
DECODE (hk.lmode,
0, 'None',
1, 'NULL',
2, 'ROW-S (SS)',
3, 'ROW-X (SX)',
4, 'SHARE',
5, 'S/ROW-X (SSX)',
6, 'EXCLUSIVE',
TO_CHAR (hk.lmode)
) mode_held,
DECODE (wk.request,
0, 'None',
1, 'NULL',
2, 'ROW-S (SS)',
3, 'ROW-X (SX)',
4, 'SHARE',
5, 'S/ROW-X (SSX)',
6, 'EXCLUSIVE',
TO_CHAR (wk.request)
) mode_requested,
TO_CHAR (hk.id1) lock_id1, TO_CHAR (hk.id2) lock_id2,          DECODE
(hk.BLOCK,
0, 'NOT Blocking',         /**//* Not blocking any other processes */
1, 'Blocking',             /**//* This lock blocks other processes */
2, 'Global',          /**//* This lock is global, so we can't tell */
TO_CHAR (hk.BLOCK)
) blocking_others
FROM v$lock hk, v$session bs, v$lock wk, v$session ws    WHERE hk.BLOCK = 1
AND hk.lmode != 0
AND hk.lmode != 1
AND wk.request != 0
AND wk.TYPE( ) = hk.TYPE
AND wk.id1( ) = hk.id1
AND wk.id2( ) = hk.id2
AND hk.SID = bs.SID( )
AND wk.SID = ws.SID( )
AND (bs.username IS NOT NULL)
AND (bs.username  'SYSTEM')
AND (bs.username  'SYS')
ORDER BY 1;

查看正在运行的JOB

SELECT * FROM DBA_JOBS_RUNNING;

检查数据库JOB的完成情况

SELECT JOB, LOG_USER, LAST_DATE, NEXT_DATE, WHAT, FAILURES  FROM DBA_JOBS;

查看正在运行的JOB对应的SID、SERIAL#、SPID

SELECT A.JOB, B.SID, B.SERIAL#, C.SPID
FROM DBA_JOBS_RUNNING A, V$SESSION B, V$PROCESS C  WHERE A.SID = B.SID
AND B.PADDR = C.ADDR
AND JOB = '21';

通过SID查询SERIAL#、SPID

SELECT B.SID, B.SERIAL#, C.SPID   FROM V$SESSION B, V$PROCESS C  WHERE B.SID = '554'
AND B.PADDR = C.ADDR;

**停止会话 --SID:554 SERIAL#:1134 SPID:23242 **

--ORACLE级别
ALTER SYSTEM KILL SESSION '554,1134';
 
--操作系统级别
kill -9 23242