Matthew T. O'Connor wrote: > Peter Eisentraut wrote: > > Is it time to turn on autovacuum by default in 8.2? I know we wanted to > > be on the side of caution with 8.1, but perhaps we should evaluate the > > experiences now. Comments? > > Would be fine by me, but I'm curious to see what the community has to > say. A few comments: > > Autovacuum can cause unpredictable performance issues, that is if it > vacuums in the middle of a busy day and people don't want that, of > course they turn it off easy enough, but they might be surprised. > > I haven't played with CVS HEAD much, but I think the logging issue has > been addressed no? That is my single biggest gripe with the 8.1 > autovacuum is that it's very hard to see if it's actually done anything > without having to turn up the logging significantly.
This has not been addressed, except that pg_stat_activity now shows autovacuum. Someone was going to work on per-module log output, but it wasn't completed for 8.2. Does pg_stat_activity now show the table being vacuumed? > The remaining big ticket items for autovacuum are the maintenance window > that Alvaro and I have just been discussing, and multiple concurrent > vacuum, (possibly you could add the continued reduction of vacuum impact > but that just a constant thing). Do we think it's worth waiting for > either of these two features prior to turning on autovacuum by default? Probably not. It can always be turned off by people who don't want it on. -- Bruce Momjian [EMAIL PROTECTED] EnterpriseDB http://www.enterprisedb.com + If your life is a hard drive, Christ can be your backup. + ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
