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| How to Check Why Shutdown Immediate Hangs? [ID 164504.1] | ||
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| Modified 30-JUN-2010 Type HOWTO Status PUBLISHED |
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Checked for relevance on 02-Mar-2010
· goal: What information to collect when shutdown immediate is hanging ?
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· fact: Oracle Server - Enterprise Edition
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fix:
In order to see why shutdown immediate is hanging we need to do the following:
A. While shutdown immediate is hanging
Start Server Manager (or SQL*Plus for 8i or higher)
SVRMGRL> connect internal (or SYSDBA for 8i or higher)
SVRMGRL> select * from x$ktuxe where ktuxecfl = 'DEAD';
This shows dead transactions that smon is looking to rollback.
B. Plan to shutdown again and gather some information. Before issuing the
shutdown immediate command set some events as follows:
SVRMGRL> connect internal
SVRMGRL> alter session set events '10046 trace name context forever,level 12';
SVRMGRL> alter session set events '10400 trace name context forever, level 1';
SVRMGRL> shutdown immediate;
10046 turns on extended SQL_TRACE for the shutdown process.
10400 dumps a systemstate every 5 minutes.
Let the shutdown go for around 15 minutes and then send the traces to Oracle
Support. The traces are written to the location specified by user_dump_dest parameter.
The trace files should show where the time is going.
Note :
Shut down immediate may hang because of various reasons.
- processes still continue to be connected to the database and do not terminate.
- SMON is cleaning temp segments or performing delayed block cleanouts.
- Uncommitted transactions are being rolled back.
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