| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | andrew_perrin(at)unc(dot)edu |
| Cc: | Justin Clift <justin(at)postgresql(dot)org>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Performance tips |
| Date: | 2002-01-10 18:22:07 |
| Message-ID: | 21590.1010686927@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
Andrew Perrin <andrew_perrin(at)unc(dot)edu> writes:
> shared_buffers is set to 128 in postgresql.conf - is that what you
> mean?
That's awfully small. On any modern machine you should be setting it in
the low thousands. (Yeah, I know the default is only 64. We've had
discussions about changing that ...) Note you must restart the
postmaster to get this change to take effect.
> HOWEVER... what I'm hearing from most folks is that, even under these
> conditions, the performance I'm experiencing is worse than
> expected. If that's true, what should I do to diagnose that?
Have you shown us the specific query and the EXPLAIN output for it?
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Andrew Perrin | 2002-01-10 18:31:57 | Re: Performance tips |
| Previous Message | will trillich | 2002-01-10 17:41:20 | Re: Selecting across Multiple Tables |