On Tue, 2007-07-10 at 11:31 -0400, Tom Lane wrote:
> Brad Nicholson <bnichols@ca.afilias.info> writes:
> > On Tue, 2007-07-10 at 11:19 -0400, Tom Lane wrote:
> >> Oh, I forgot to mention --- you did check that vacuum_mem is set to
> >> a pretty high value, no? Else you might be doing a lot more
> >> btbulkdelete scans than you need to.
>
> > What would you define as high for 7.4? I bumped it up to ~ 245mbs
>
> That sounds like plenty --- you only need 6 bytes per dead tuple,
> so that should be enough to handle all your 15-20M dead tuples in
> one scan.
>
> How big is this index again?
Not sure which one it's working on - there are 6 of them each are ~
2.5GB
--
Brad Nicholson 416-673-4106
Database Administrator, Afilias Canada Corp.