Oracle DB異常時關閉與啓動
1. 生成OS級kill -9腳本
set head off
set feedback off
set pagesize 0
spool /tmp/kill_9_scripts.sh
select ' kill -9 ' || spid from (select spid from v$process where addr in(select paddr from v$session where status='ACTIVE' and username is not null));
spool off
2.生成DB級kill session腳本
set head off
set feedback off
set pagesize 0
spool /tmp/kill_sess_scripts.sql
select 'alter system kill session ' || '''' || sid || ',' || serial# || '''' || ';'from v$session where status='ACTIVE' and username is not null;
spool off
3.執行kill_sess_scripts.sql腳本
SQL>@/tmp/kill_sess_scripts.sql
如果session kill之後不能釋放執行,那麼在OS級執行kill -9腳本
sh /tmp/kill_9_scripts.sh
4. 如果發現kill session無效無法恢復應用進行如下操作
alter system set job_queue_processes=0;
alter system set aq_tm_processes=0;
lsnrctl stop listener_xxx
sqlplus “/as sysdba”
oradebug setmypid
oradebug unlimit
oradebug dump systemstate 10
等1分鐘
oradebug dump systemstate 10
等1分鐘
oradebug dump systemstate 10
Exit
如果數據庫處於HANG狀態:
sqlplus “/as sysdba”
oradebug setmypid
oradebug unlimit
oradebug hanganalyze 3
等1分鐘
oradebug hanganalyze 3
oradebug dump systemstate 10
等1分鐘
oradebug dump systemstate 10
等1分鐘
oradebug dump systemstate 10
Exit
該步驟超過15分鐘,停止做systemstate dump
再次生成OS級kill -9腳本,KILL所有ORACLE用戶進程
再次生成DB級kill session腳本,kill所有ORACLE用戶進程
Select group#, status, archived from v$log where status in ('ACTIVE', 'CURRENT');
select RECOVERY_ESTIMATED_IOS,ACTUAL_REDO_BLKS,TARGET_REDO_BLKS,LOG_FILE_SIZE_REDO_BLKS,TARGET_MTtr,ESTIMATED_MTTR from v$Instance_recovery;
如果group處於active 狀態的個數超過1個,並且v$instance_recovery.estimated_mttr大於600秒則最好延遲數據庫的關閉,等待I/O量下降,
等到v$instance_recovery.estimated_mttr小於v$instance_recovery.target_mttr,否則數據庫啓動的時間會達到v$instance_recovery.estimated_mttr的時間。
(如果v$instance_recovery.estimated_mttr小於600秒,啓動數據庫採用方法一,否則採用方法二。)
Alter system checkpoint;
Alter system switch logfile;
Shutdown immediate
等5分鐘,關閉還未結束,alert.log中沒有相關的關閉信息
shutdown abort
ps -ef|grep LOCAL|grep oracle"$ORACLE_SID"
ps -ef|grep ora_|grep "$ORACLE_SID"
使用kill -9 pid
ipcs –a |grep ORACLE_USER
查找信號燈是否未釋放,如果未釋放,使用ipcrm清理信號燈:
ipcrm -m shmid
ipcrm -s semid
6 startup mount
7 alter database open
8 檢查數據庫狀態
spool /tmp/sess_startup.log
alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';
select sid, serial#, username, machine, program, module, last_call_et,logon_time from v$session;
select s.sid, s.serial#, s.username, s.machine,s.program,sw.event
from v$session_wait sw, v$session s
where sw.sid=s.sid
and sw.event not like 'SQL%'
and sw.event not like 'rdbms%'
and sw.event not like '%timer';
select status from v$instance;
spool off
9 檢查當前正在進行的回滾事務
Select ktuxeusn,to_char(sysdate,'DD-MON-YYYY HH24:MI:SS'),ktuxesiz,ktuxesta from x$ktuxe Where ktuxecfl='DEAD';
ktuxesiz爲0表示事務回滾結束,如果不等於0也不必等待。
10 啓動監聽
lsnrctl start $ORACLE_SID