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Query against V$SESSION hangs on 10g RAC systems
- From: "Dean" <snowman327@xxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 1 Nov 2007 09:55:21 -0600
We recently had a locking/blocking problem on two different 10.2.0.3 RAC
systems. I ran a query similar to below to get more information:
select sid, serial#, program, module, action, username, osuser,
sql_hash_value, machine, event, blocking_session
from v$session
where status='ACTIVE';
About 1 out of 5 times this query hangs. When it hangs, it waits for
exactly 60 seconds on "DIAG idle wait" and then returns the result set. If
I remove the blocking_session column, this query runs fine and never hangs.
Has anyone run into this or have any ideas why this would happen?
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