RE: Statspack performance problem

That seems to have been the problem.
The snap ran in 2 seconds after setting the level to 0. This database has 50k+ SQL statements cached, usually.

Setting it back to 5 is taking a very long time. Apparently there is a lot going on behind the scenes when changing the snap level.

In checking v$session_wait I find a lot of waits on latch free and direct path write. This session has not done any sorts to disk, so I'm not sure why there are direct path writes.

Maybe there are LOB's in Perfstat schema? Dunno, have not looked.

Thanks,

Jared

John Kanagaraj <john.kanagaraj_at_hds.com>
Sent by: root_at_fatcity.com
 01/08/2003 01:55 PM
 Please respond to ORACLE-L  

        To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
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        Subject:        RE: Statspack performance problem

Jared,

Did you snap with the default value of 5? If so, then the SNAP proceduer will have to scan / sort V$SQLAREA and that can be very time-consuming. If you are CPU starved or have very high shared_pool access or issues in that area, then this could explain it.... Try this with a snap level of 0 and let
us know if this solves the issue.

John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002

What would you see if you were allowed to look back at your life at the end
of your journey in this earth?

• The opinions and statements above are entirely my own and not those of my employer or clients **

> -----Original Message-----
> From: Jared.Still_at_radisys.com [mailto:Jared.Still_at_radisys.com]
> Sent: Wednesday, January 08, 2003 10:45 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Statspack performance problem
>
>
> List,
>
> Is anyone aware of performance problems with statspack on 8.1.6.3 on
> Windoze?
>
> By performance problem, I mean that statspack.snap runs for several
> minutes
> before I eventually kill it.
>
> Trying to check on MetaLink, but it isn't responding at the moment.
>
> Thanks,
>
> Jared
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
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