Try the pg_autovacuum daemon in CVS contrib dir. It works fine with 7.3. Chris
----- Original Message ----- From: "Jeff" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 05, 2003 8:09 PM Subject: [PERFORM] Some vacuum & tuning help > I've been trying to search through the archives, but it hasn't been > successful. > > We recently upgraded from pg7.0.2 to 7.3.4 and things were happy. I'm > trying to fine tune things to get it running a bit better and I'm trying > to figure out how vacuum output correlates to tuning parameters. > > Here's the msot recent vacuum for the "active" table. It gets a few > hundred updates/inserts a minute constantly throughout the day. > > INFO: Pages 27781: Changed 0, Empty 0; Tup 2451648: Vac 0, Keep 0, UnUsed > 1003361. > Total CPU 2.18s/0.61u sec elapsed 2.78 sec. > > I see unused is quite high. This morning I bumped max_fsm_pages to 500000. > If I'm thinking right you want unused and max_fsm to be closish, right? > (Yesterday it was down around.. oh.. 600k?) > > I'm thinking vacuum full's may be in order. Which stinks because I was > hoping to do away with the db essentially down for 10 minutes (includes > all the db's on that machine) while it vacuum'd. > > The upside is: it is performing great. During the vacuum analyze I do get > a few multi-second pauses while something occurs. I figured it was a > checkpoint, so I bumped checkpoint_timeout to 30 seconds and wal_buffers > to 128. (I'm just guessing on wal_buffers). > > Machine is weenucks 2.2.17 on a dual p3 800, 2gb ram, 18gb drive (mirrored). > If you guys need other info (shared_buffers, etc) I'll be happy to funish > them. but the issue isn't query slowness.. just want to get this thing > oiled). > > thanks > > -- > Jeff Trout <[EMAIL PROTECTED]> > http://www.jefftrout.com/ > http://www.stuarthamm.net/ > > > > ---------------------------(end of broadcast)--------------------------- > TIP 6: Have you searched our list archives? > > http://archives.postgresql.org > ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
