Oracle 11g 数据库服务器CPU、IO负载高的故障排除流程
使用top查看负载高的进程
~ [OSMSRDB]$ top
top - 11:02:43 up 12 days, 17:15, 4 users, load average: 1.50, 0.93, 0.36
Tasks: 363 total, 1 running, 362 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.2%us, 0.3%sy, 0.0%ni, 68.4%id, 30.1%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 10129680k total, 7539812k used, 2589868k free, 478612k buffers
Swap: 4194300k total, 0k used, 4194300k free, 5973136k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
22584 ora112 -2 0 837m 16m 14m S 100.0 3.7 74:09.62 oracle
3274 ora112 -2 0 837m 16m 14m S 1.0 0.2 211:11.85 oracle
6147 ora112 -2 0 837m 16m 14m S 1.0 0.2 19:25.63 oracle
7787 ora112 -2 0 837m 16m 14m S 1.0 0.2 62:43.66 oracle
10696 ora112 -2 0 2251m 16m 14m S 1.0 0.2 190:34.75 oracle
17198 ora112 -2 0 837m 16m 14m S 1.0 0.2 60:53.89 oracle
1874 root 20 0 13584 740 576 S 0.3 0.0 1:11.80 lldpad
3323 ora112 20 0 837m 18m 16m S 0.3 0.2 21:49.55 oracle
使用 PS 查看进程的信息
~ [OSMSRDB]$ ps -ef|grep 22584
ora112 15567 16186 0 11:06 pts/1 00:00:00 grep 22584
ora112 22584 1 1 Sep19 ? 01:14:13 ora_vktm_OSMSRDB
登陆数据库，查看等待事件
SELECT * FROM V$SESSION_WAIT WHERE WAIT_CLASS <> 'Idle' ORDER BY SECONDS_IN_WAIT DESC;
查看数据库正在执行的SQL，发现一直在执行的是DBMS_SCHEDULER模块，job名是OSMSR_OPERATION_DURATION
select s.SID,s.SERIAL#,MACHINE,TERMINAL, OSUSER, SCHEMANAME, PROGRAM,MODULE,ACTION,CLIENT_INFO,
decode(s.COMMAND,3,'SELECT',s.COMMAND) COMMAND,STATUS,SQL_ID,SQL_ADDRESS,SQL_EXEC_START,
DECODE(STATUS,'ACTIVE',LAST_CALL_ET,NULL) "SQL执行时间",EVENT,STATE,SECONDS_IN_WAIT,SERVICE_NAME
from V$SESSION s where s.USERNAME is not null AND WAIT_CLASS <> 'Idle';
查看job
select job_name,state from dba_scheduler_jobs where state= 'RUNNING';
停止job
SQL> BEGIN
DBMS_SCHEDULER.STOP_JOB('OSMSR_OPERATION_DURATION');
END; 2 3
4 /
PL/SQL procedure successfully completed.
SQL> select job_name,state from dba_scheduler_jobs where state= 'RUNNING';
no rows selected
~ [OSMSRDB]$ top
top - 11:02:43 up 12 days, 17:15, 4 users, load average: 1.50, 0.93, 0.36
Tasks: 363 total, 1 running, 362 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.2%us, 0.3%sy, 0.0%ni, 68.4%id, 30.1%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 10129680k total, 7539812k used, 2589868k free, 478612k buffers
Swap: 4194300k total, 0k used, 4194300k free, 5973136k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
22584 ora112 -2 0 837m 16m 14m S 100.0 3.7 74:09.62 oracle
3274 ora112 -2 0 837m 16m 14m S 1.0 0.2 211:11.85 oracle
6147 ora112 -2 0 837m 16m 14m S 1.0 0.2 19:25.63 oracle
7787 ora112 -2 0 837m 16m 14m S 1.0 0.2 62:43.66 oracle
10696 ora112 -2 0 2251m 16m 14m S 1.0 0.2 190:34.75 oracle
17198 ora112 -2 0 837m 16m 14m S 1.0 0.2 60:53.89 oracle
1874 root 20 0 13584 740 576 S 0.3 0.0 1:11.80 lldpad
3323 ora112 20 0 837m 18m 16m S 0.3 0.2 21:49.55 oracle
使用 PS 查看进程的信息
~ [OSMSRDB]$ ps -ef|grep 22584
ora112 15567 16186 0 11:06 pts/1 00:00:00 grep 22584
ora112 22584 1 1 Sep19 ? 01:14:13 ora_vktm_OSMSRDB
登陆数据库，查看等待事件
SELECT * FROM V$SESSION_WAIT WHERE WAIT_CLASS <> 'Idle' ORDER BY SECONDS_IN_WAIT DESC;
查看数据库正在执行的SQL，发现一直在执行的是DBMS_SCHEDULER模块，job名是OSMSR_OPERATION_DURATION
select s.SID,s.SERIAL#,MACHINE,TERMINAL, OSUSER, SCHEMANAME, PROGRAM,MODULE,ACTION,CLIENT_INFO,
decode(s.COMMAND,3,'SELECT',s.COMMAND) COMMAND,STATUS,SQL_ID,SQL_ADDRESS,SQL_EXEC_START,
DECODE(STATUS,'ACTIVE',LAST_CALL_ET,NULL) "SQL执行时间",EVENT,STATE,SECONDS_IN_WAIT,SERVICE_NAME
from V$SESSION s where s.USERNAME is not null AND WAIT_CLASS <> 'Idle';
查看job
select job_name,state from dba_scheduler_jobs where state= 'RUNNING';
停止job
SQL> BEGIN
DBMS_SCHEDULER.STOP_JOB('OSMSR_OPERATION_DURATION');
END; 2 3
4 /
PL/SQL procedure successfully completed.
SQL> select job_name,state from dba_scheduler_jobs where state= 'RUNNING';
no rows selected
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/26506993/viewspace-2125355/ ，如需转载，请注明出处，否则将追究法律责任。
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