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Re: [Fwd: Cron <postgres@db2> /var/lib/pgsql/vacstat.py check]



On Wed, 2008-07-09 at 12:27 -0700, Toshio Kuratomi wrote:
> Mike Bonnet wrote:
> > On Wed, 2008-07-09 at 11:33 -0700, Toshio Kuratomi wrote:
> >> Since the plan is to move koji to db3 within the week I'd like to hold 
> >> off on this.  The dump and reload to move to the new server should be 
> >> more effective than a manual vacuum.
> > 
> > Note that you still need to analyze all the tables after a dump/reload
> > to regenerate database statistics.  Otherwise postgres may choose some
> > less-than-optimal query plans.
> > 
> Good point.
> 
> Also note, we're currently debating whether to move to postgres-8.3 for 
> koji now or later.  8.3 has a whole slew of enhancements that could make 
> our lives better[1]_.  On the debit side we haven't tested koji with 8.3 
> here.  However, dgilmore has been running sparc.koji.fp.o (FC6) with 
> pg-8.3 which is pretty similar to our environment.

If dgilmore hasn't seen any issues with Postgres 8.3, I'm all for using
that.  In addition, if we do run into performance/scaling issues, I'm
sure the Postgres developers will be much more eager to assist us with
them if we're running 8.3 rather than an older version.

> .. _[1]: Combing the NEWS for changes from 8.1=>8.3 I came up with the 
> list here: https://fedorahosted.org/fedora-infrastructure/ticket/547
> 
> -Toshio
> 
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