| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Johnson, Shaunn" <SJohnson6(at)bcbsm(dot)com> |
| Cc: | "'pgsql-general(at)postgresql(dot)org'" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: database tuning |
| Date: | 2002-08-15 00:25:03 |
| Message-ID: | 18014.1029371103@sss.pgh.pa.us |
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| Lists: | pgsql-general |
"Johnson, Shaunn" <SJohnson6(at)bcbsm(dot)com> writes:
> A few weeks ago, I installed and migrated data
> from version 7.1.3 to version 7.2.1. After that,
> it seems that when I load data, have users do
> a select / insert / or otherwise access the
> database, it takes a very long time to complete.
Do you see a lot of disk activity when this happens? If the bottleneck
is not CPU it seems like it must be I/O.
I'm wondering if you forgot to do a "vacuum analyze" in the new
installation, and so the planner is choosing bad query plans.
regards, tom lane
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