Re: [PERFORM] AutoVacuum_NapTime

2010-02-22 Thread Alvaro Herrera
George Sexton wrote: > If I'm cold starting the system, would it vacuum all 330 databases and then > wait 720 minutes and then do them all again, or would it distribute the > databases more or less evenly over the time period? the latter -- Alvaro Herrerahttp://w

Re: [PERFORM] AutoVacuum_NapTime

2010-02-20 Thread George Sexton
> -Original Message- > From: Tom Lane [mailto:t...@sss.pgh.pa.us] > Sent: Saturday, February 20, 2010 6:15 PM > To: George Sexton > Cc: pgsql-performance@postgresql.org > Subject: Re: [PERFORM] AutoVacuum_NapTime > > "George Sexton" writes: > > I

Re: [PERFORM] AutoVacuum_NapTime

2010-02-20 Thread Tom Lane
"George Sexton" writes: > I have a system with around 330 databases running PostgreSQL 8.4.2 > What would the expected behavior be with AutoVacuum_NapTime set to the > default of 1m and autovacuum_workers set to 3? autovacuum_naptime is the cycle time for any one database, so you'd get an autovac

[PERFORM] AutoVacuum_NapTime

2010-02-20 Thread George Sexton
I have a system with around 330 databases running PostgreSQL 8.4.2 What would the expected behavior be with AutoVacuum_NapTime set to the default of 1m and autovacuum_workers set to 3? What I'm observing is that the system is continuously vacuuming databases. Would these settings mean the autovac