On Tue, Mar 14, 2006 at 11:44:12AM -0500, Pallav Kalva wrote: > Hi, > > Do we have to vacuum template0 database regularly ? We got this warning > this morning while vacuuming databases. As a part of my daily vacuum job > I do vacuum of quartz, helix_fdc and affiliate databases which are the > one's which are heavily updated and used. But today I realized that usps, > template1 and template0 is also being used in a transaction somehow based > on this (SELECT datname, age(datfrozenxid) FROM pg_database;) query. > Actually we dont do any updates on usps , template1 and templat0 databases > but some how still the age(datfrozenxid keeps incrementing. > My question now is do I have to vacuum daily template1 and template0 > databse, is there any harm on vacuuming these databases daily ?, since > these are postgres system tables I am kind of worried. I was told that > template0 is freezed but not sure why the age(datfrozenxid keeps > incrementing. I am going to vacuum usps from now anyway. We are using > Postgres version 8.0.2 You should upgrade to 8.0.6; data loss bugs have been fixed in there. If you never update USPS you can do a vacuum freeze on it and you won't need to worry about XID rollover. Same with template1. But if they're small databases it's probably safer just to periodically vacuum (once a month or so). If you up to 8.1 and enable autovacuum, it should take care of all of this for you. -- Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
