| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | mlw <markw(at)mohawksoft(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Nicolas Bazin <nbazin(at)ingenico(dot)com(dot)au>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Postgresql backend to perform vacuum automatically |
| Date: | 2002-03-05 19:28:14 |
| Message-ID: | 200203051928.g25JSEF10704@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
mlw wrote:
> Bruce Momjian wrote:
> >
> > Tom Lane wrote:
> > > Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > > > Yes, I am seeing only zeros too. Jan?
> > >
> > > Did you turn on statistics gathering? See the Admin Guide's discussion
> > > of database monitoring.
> >
> > Oops, now I remember. Those are off by default and only the query
> > string is on by default. Thanks.
>
> This raises the question, by turning these on, does that affect database
> performance?
>
> If so, it may not be the answer for a selective vacuum.
>
> If they do not affect performance, then why have them off?
I think Jan said 2-3%. If we can get autovacuum from it, it would be a
win to keep it on all the time, perhaps.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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