The formula in the book is just another form of hit ratio IMO. As Mark suggested, just check the max allocated a few times, or check it historically if you are running statspack.
Set the pga_aggregate_target to that value plus a margin you feel comfortable with, and then monitor and adjust as needed. 9i gives you tools for managing memory that just didn't exist in previous versions. Jared On Mon, 2003-12-29 at 05:04, Jeffrey Beckstrom wrote: > Will look at what you suggest. The Oracle docs suggest you using a formula based on > amount of system memory. However, this is not the only database on the server. > > >>> [EMAIL PROTECTED] 12/26/03 3:29:26 PM >>> > Jeffrey, > > If you are simply looking at a conversion from 8i to 9iR2, and you're not > going to be implementing a bunch of new 9i features (that could affect PGA > usage), then it's probably reasonably straightforward. You can look at > 'session pga memory' and 'session pga memory max' statistics in V$SESSTAT to > get an idea of current PGA memory consumption in 8i. The 'max' statistic > is probably more interesting in terms of total aggregate memory consumption -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jared Still INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (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).
