RE: pga_aggregate_target
- From: Wolfson Larry - lwolfs <lawrence.wolfson@xxxxxxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 13 May 2004 20:55:59 -0500
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@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Tanel P=F5der
Sent: Thursday, May 13, 2004 1:38 PM
To: oracle-l@xxxxxxxxxxxxx
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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