On Mon, Feb 23, 2009 at 4:08 PM, Scott Marlowe <scott.marl...@gmail.com>wrote:
> One last thing. You were doing vacuum fulls but NOT reindexing, right? > > I quote from the document at google docs: > 13:50:00 vacuum full & analyze on all databases through pgadmin > > 1: Do you have evidence that regular autovacuum isn't keeping up? > 2: If you have such evidence, and you have to vacuum full, vacuum full > doesn't really shrink indexes all that well. > > For a heavily updated database, the 1, 2, 3 punch of autovacuum > (adjusted properly!), the background writer (adjusted properly) > smoothing things out, and the HOT updates reusing all that space > autovacuum is constantly reclaiming, meaning you should be able to > avoid routine vacuum fulls. It's made a huge difference in db > maintenance for me. > > Still I do find myself in vacuum full territory once or twice a year > (rogue update or something like that on a live database). If you do > have to vacuum full then reindex. OR cluster on your favorite index. > I have no evidence of autovacuum not working, the manual full was done for purpose of elimination.
