Thanks for this reply, Ron. This is almost what I was looking for. While the upgrade to the latest version is out of the question (which unfortunately for me became the subject of this discussion) still, I was looking for the ways to improve the performance of the 7.0.2 version. Extensive use of vacuum was almost obvious, though I was hoping to get some more tips from postrges gurus (or dinosaurs, if you want). Anyways, the 8.2.4 was not performing so well without auto-vacuum. It ramped up to 50% of CPU usage in 2 hours under the load. With the auto-vacuum ON I've got what I really need and thus I know what to do next. Just for the record - the hardware that was used for the test has the following parameters: AMD Opteron 2GHZ 2GB RAM LSI Logic SCSI Thanks everyone for your assistance! Sergey -----Original Message----- From: pgsql-performance-owner@xxxxxxxxxxxxxx [mailto:pgsql-performance-owner@xxxxxxxxxxxxxx] On Behalf Of Ron Sent: Monday, April 23, 2007 11:07 AM To: Mario Weilguni Cc: pgsql-performance@xxxxxxxxxxxxxx Subject: Re: [PERFORM] postgres: 100% CPU utilization At 04:53 AM 4/23/2007, Mario Weilguni wrote: >Am Donnerstag, 19. April 2007 schrieb Sergey Tsukinovsky: > > 2. What would be the recommended set of parameters to tune up in order > > to improve the performance over the time, instead of considering an > > option to vacuum every 30 minutes or so? > > > > 3. Is it safe to run 'vacuum' as frequently as every 15-30 minutes? >No problem. > > > > > 4. Suggestions? >Do yourself a favor and upgrade at least to 8.1.x and use autovacuum. In fact, I'll go one step further and say that pg improves so much from release to release that everyone should make superhuman efforts to always be running the latest stable release. Even the differences between 8.1.x and 8.2.x are worth it. (and the fewer and more modern the releases "out in the wild", the easier community support is) Cheers, Ron Peacetree ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
