Re: query slow in 9i, but not slow in 8i

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Tue, 2 Mar 2004 12:22:52 -0000
Message-ID: <00c601c40051$15a54480$6702a8c0@Primary>

I should have checked before posting.

pga_aggregate_target defaults to zero,
and the instance won't start if you set
it to zero when workarea_size_policy
is set to AUTO.

It's DBCA that sets the pga_aggregate_target to 25M for you if you don't interfere. (Giving you a whole new meaning for 'default install')

Regards

Jonathan Lewis
http://www.jlcomp.demon.co.uk

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Original Message ----- From: "Jonathan Lewis" <jonathan_at_jlcomp.demon.co.uk> To: <oracle-l_at_freelists.org> Sent: Tuesday, March 02, 2004 9:38 AM Subject: Re: query slow in 9i, but not slow in 8i

>
> True -
>
> If work_area_policy = auto in 9.2, then the
> pga_aggregate_target is used. Since this
> defaults to 25M (better check that) and the
> limit for a process is 5% of total, then the
> v9 run is probably trying to do its sort with
> 1.25M, rather than the 90M used by 8i.
>

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Received on Tue Mar 02 2004 - 06:19:38 CST