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ORACLE定期清理INACTIVE会话

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Release: 2016-06-07 15:03:16
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欢迎进入Oracle社区论坛,与200万技术人员互动交流 >>进入 另外,由于kill session是直接将session kill掉,有可能出现导致事物回滚的现象,其实我们可以使用disconnect session完成当前事务并终止session.这种方式比alter system kill session跟安全可靠。

欢迎进入Oracle社区论坛,与200万技术人员互动交流 >>进入

 

  另外,由于kill session是直接将session kill掉,有可能出现导致事物回滚的现象,其实我们可以使用disconnect session完成当前事务并终止session.这种方式比alter system kill session跟安全可靠。

  1: CREATE OR REPLACE PROCEDURE SYS.DB_KILL_IDLE_CLIENTS AUTHID DEFINER AS

  2:    job_no number;

  3:    num_of_kills number := 0;

  4: BEGIN

  5:

  6:    FOR REC IN

  7:        (SELECT SID, SERIAL#, INST_ID, MODULE,STATUS

  8:         FROM gv$session S

  9:             WHERE S.USERNAME IS NOT NULL

  10:             AND UPPER(S.PROGRAM) IN ('xxxx', 'xxxx')

  11:                  AND S.LAST_CALL_ET >= 2*60*60

  12:             AND S.STATUS'KILLED'

  13:         ORDER BY INST_ID ASC

  14:             ) LOOP

  15:          ---------------------------------------------------------------------------

  16:          -- kill inactive sessions immediately

  17:          ---------------------------------------------------------------------------

  18:          DBMS_OUTPUT.PUT('LOCAL SID ' || rec.sid || '(' || rec.module || ')');

  19:          execute immediate 'alter system disconnect session ''' || rec.sid || ', ' ||

  20:                             rec.serial# || '''immediate' ;

  21:

  22:          DBMS_OUTPUT.PUT_LINE('. killed locally ' || job_no);

  23:          num_of_kills := num_of_kills + 1;

  24:    END LOOP;

  25:    DBMS_OUTPUT.PUT_LINE ('Number of killed system sessions: ' || num_of_kills);

  26: END DB_KILL_IDLE_CLIENTS;

  27: /

  然后,我们可以在作业(JOB)或Schedule里面定期调用该存储过程,也可以通过后台作业结合shell脚本实现定期清理空闲会话的功能。例如如下所示。

  创建killSession.sh脚本,调用该存储过程SYS.DB_KILL_IDLE_CLIENTS

  1: #!/bin/bash

  2:

  3:

  4:

  5: logfile=/home/oracle/cron/session/log/killSession.log

  6:

  7: echo " " 》 $logfile 2>&1

  8: echo "START ----`date`" 》 $logfile 2>&1

  9: sqlplus /nolog 《STATS

  10: connect / as sysdba

  11: exec sys.db_kill_idle_clients;

  12: exit;

  13: STATS

  14:

  15: echo "END ------`date`" 》 $logfile 2>&1

  在crontab里面配置后台作业,每隔15分钟运行一次,清理哪些满足条件的空闲会话。

  0,15,30,45 * * * * /home/oracle/cron/session/bin/killSession.sh >/dev/null 2>&1

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ORACLE定期清理INACTIVE会话

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