时间:2021-07-01 10:21:17 帮助过:53人阅读
列举四种shutdown Hang的情况。
第一种情况的原因和给出的解决方案
Shutdown Immediate Hangs / Active Processes Prevent Shutdown (文档 ID 416658.1)
This is not a bug.
If the DB Control repository is running on the database target against which shutdown immediate was attempted then an incorrect order of events seems used.
You should stop DB Control first to get rid of all connections between DB Control and the repository database and then shutdown the database with ‘shutdown immediate‘.
Current database sessions may show:
SQL> select SID, USERNAME, PROGRAM from v$session;
SID USERNAME PROGRAM
----- ---------------------- ----------------------------------
243 SYSTEM SQL Developer
246 SYSMAN OMS
247 oracle@lgiora09 (q001)
248 oracle@lgiora09 (q000)
251 DBSNMP emagent@lgiora09 (TNS V1-V3)
252 SYSMAN OMS
253 SYSMAN OMS
254 DBSNMP emagent@lgiora09 (TNS V1-V3)
255 SYSTEM java.exe
256 SYSMAN OMS
Clearly OMS and OEM are connected (Oracle Enterprise Manager Grid Control or DBConsole) via users SYSMAN and DBSNMP.
These sessions should be de-activated (that is to log off any OEM, OMS, SYSMAN and DBSNMP) before the shutdown immediate is attempted.
Oracle Enterprise Manager, Grid Control, Dbconsole and agents keep doing internal processing.
This may include a few PLSQL notification procedures running on the database by database control like
BEGIN EMD_NOTIFICATION.QUEUE_READY(:1, :2, :3); END;
As per internal documentation of the shutdown immediate, if there are active calls then it would wait for all the active calls to finish.
To implement the solution:
1. Given OEM connections are active (SYSMAN and DBSNMP), de-activate these sessions, i.e. by stopping the agent/DBConsole
2. Then shutdown immediate as normal
- OR -
There may be processes still running and holding locks at the time a shutdown is issued.
Sometimes these are failed jobs or transactions, which are effectively ‘zombies‘, which are not able to receive a signal from Oracle.
If this occurs, the only way to shutdown the database is by doing:
sql>
shutdown abort
startup restrict
shutdown normal
The startup does any necessary recovery and cleanup, so that a valid cold backup can be taken afterward.
If this issue occurs frequently, it would be a good practice to see if there are any active user processes running in v$session or v$process before shutting down the instance.
If the problem persists, and no apparent user processes are active, you can set this event prior to issuing the shutdown command in order to see what is happening. This will dump a systemstate every 5 minutes while shutdown is hanging
SQL>
connect / as sysdba
alter session set events ‘10400 trace name context forever, level 1‘;
Then issue the shutdown command.
3. You can kill the sessions preventing shutdown. Refer: Alert Log: Shutdown Waiting for Active Calls to Complete (Doc ID 1039389.6)
本文出自 “DBA Fighting!” 博客,请务必保留此出处http://hbxztc.blog.51cto.com/1587495/1919778
Oracle 关闭(shutdown immediate)时hang住
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