RE: Query against V$SESSION hangs on 10g RAC systems
- From: M Rafiq <rafiq9857@xxxxxxxxxxx>
- To: <exriscer@xxxxxxxxx>, <snowman327@xxxxxxxxx>
- Date: Fri, 2 Nov 2007 10:01:12 -0400
I ran this query on a non rac 10.2.0.3 database and it returned the rows very
quickly. It may be some RAC related issue.
Regards
Rafiq
Date: Fri, 2 Nov 2007 08:35:40 +0100From: exriscer@xxxxxxxxxxx:
snowman327@xxxxxxxxxxxxxxxx: Re: Query against V$SESSION hangs on 10g RAC
systemsCC: oracle-l@xxxxxxxxxxxxx
hi
querying blocking_session is the problem, if you dont query that columnd then
it should be fine
I have a customer who requested a backport to fix the bug but the one-off patch
has no effect so might have to wait until 10.2.0.4
thanks
--
LSC
On 11/1/07, Dean <snowman327@xxxxxxxxx> wrote:
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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