Oracle-L: Automatic PGA Memory Management via PGA_AGGREGATE

From: David Wagoner <dwagoner_at_arsenaldigital.com>
Date: Mon, 04 Mar 2002 10:58:21 -0800
Message-ID: <F001.0041E83F.20020304105821@fatcity.com>

I just stumbled upon the "Automatic PGA Memory Management" section of the 9i docs. I've never heard of this before. Does anyone know how long it's been around? Anyone using it found any bugs, concerns, etc.?

Granted, this is intended for *dedicated* server mode, it seems like a good option for our Test databases and perhaps other databases that have only a handful of users and don't require MTS. By setting PGA_AGGREGATE_TARGET=X, where X can be a value in K, M, or G, Oracle will automatically distribute this memory allocation to dedicated sessions instead of using SORT_AREA_SIZE. Here's an excerpt from the docs:

"Oracle does not recommend using the SORT_AREA_SIZE parameter unless the instance is configured with the shared server option. Oracle recommends that you enable automatic sizing of SQL working areas by setting PGA_AGGREGATE_TARGET instead. SORT_AREA_SIZE is retained for backward compatibility."

Learn something new every day in Oracle land...

david

David B. Wagoner
Database Administrator
Arsenal Digital Solutions Worldwide, Inc. 8000 Regency Parkway, Suite 110
Cary, NC 27511-8582
Tel. (919) 466-6723
Fax (919) 466-6783
Mobile (919) 225-4962
dwagoner_at_arsenaldigital.com
<http://www.arsenaldigital.com/> http://www.arsenaldigital.com/

NOTICE *** This e-mail message is confidential, intended only for the named recipient(s) above and may contain information that is privileged, work product or exempt from disclosure under applicable law. If you have received this message in error, or are not the named recipient(s), please immediately notify the sender by phone or email and delete this e-mail message from your computer. Thank you.

--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
--

Author: David Wagoner
INET: dwagoner_at_arsenaldigital.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------

To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Mon Mar 04 2002 - 12:58:21 CST

Automatic PGA Memory Management via PGA_AGGREGATE_TARGET paramete