Re: PGA_AGGREGATE_TARGET cannot be unset without a restart
- From: Jared.Still@xxxxxxxxxxx
- To: oracle-l@xxxxxxxxxxxxx
- Date: Tue, 29 Jun 2004 11:37:23 -0700
Hemant,
Have you checked MetaLink for possible bugs?
I did quite a bit of testing of this on 9.2.0.3, and don't recall any
difficulties
in configuring this dynamically.
Jared
oracle-l-bounce@xxxxxxxxxxxxx wrote on 06/29/2004 07:53:07 AM:
>
> I have a number of 9.2 databases. I had gradually begun
> using PGA_AGGREGATE_TARGET and WORKAREA_POLICY and was comfortable with
them.
> However, the last database I switched to using P_A_T and W_P
> doesn't perform very well. This has a very high rate of
> connect/disconnects [11 to 18 per second][
> we can discuss why I don't use connection pooling / shared
> server etc seperately] and P_A_T sometimes results in
> some sessions with extremely high process sizes.
> Apparently, the dynamic recomputation of Target Memory
> isn't fast enough and the Oracle Kernel seems to be
> getting false values.
>
> I was able to change WORKAREA_POLICY back to MANUAL with
> an ALTER SYSTEM command but P_A_T, once set to any value
> cannot be set back to 0. Even though W_P is now MANUAL,
> the database instance still seems to be using P_A_T.
> I can only try reducing P_A_T but the process sizes indicate
> that it is being used.
>
> Has anyone come across similar behaviour ?
>
> This is 9.2.0.2RAC on Tru64.
>
> Hemant K Chitale
> Oracle 9i Database Administrator Certified Professional
> http://web.singnet.com.sg/~hkchital
>
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