RE: pga_aggregate

From: Wolfson Larry - lwolfs <lawrence.wolfson_at_acxiom.com>
Date: Thu, 13 May 2004 20:55:59 -0500
Message-ID: <A366E86AF2FBD611AB920002B31E58B0096DC855@conmsx07.corp.acxiom.net>

Hi Tanel,

How are you doing?

	Not clear on last thing you said.
	You mean alter session for workarea_size_policy to manual and then

set sort_area_size to what you want for that session?

On various servers we have a number of batch jobs running alone where we set SAS and SARS to 1-2G. Sometimes it's set in job and sometimes with logon trigger, like for imp.

Larry
=09

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Tanel P=F5der Sent: Thursday, May 13, 2004 1:38 PM
To: oracle-l_at_freelists.org
Subject: Re: pga_aggregate_target

> I have alot of batch loading processes that run over night. A few them use
2GB or more of sort space in my temp tablespace. I know I can increase my pga_aggregate_target dynamically, however, I believe I read that oracle only allows 1 process to use up to 5% of the pga_aggregate_Target.

Yes, there is a 5% rule for a serial session and 30% rule for a parallel session. You could increase _smm_max_size (set in kilobytes) to raise the workarea memory usage limit for a serial session. The equivalent parameter for a parallel session is _smm_px_max_size.

This is unsupported of course.

> anyway to flex this up? I just need the extra sort space for a few
operations at certain times.

Better approach would be to set workarea_size_policy to manual in your specific sessions needing more memory. You can alter this parameter in session level, but I haven't tested whether this actually works...

Tanel.

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Received on Thu May 13 2004 - 21:08:22 CDT

RE: pga_aggregate_target