| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Martin Hampl <Martin(dot)Hampl(at)gmx(dot)de> |
| Cc: | pgsql-novice(at)postgresql(dot)org |
| Subject: | Re: Query does not use index |
| Date: | 2004-05-01 15:48:57 |
| Message-ID: | 14409.1083426537@sss.pgh.pa.us |
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| Lists: | pgsql-novice |
Martin Hampl <Martin(dot)Hampl(at)gmx(dot)de> writes:
> Am 30.04.2004 um 17:52 schrieb Tom Lane:
>> It could be that this table has a lot of empty pages near the front,
> I never deleted anything from this database, but it might be that I
> dropped some of the tables a couple of times when populating the
> database. Also 'copy from' failed a couple of times. Can that have the
> same effect?
A failed copy-in would leave a dead row for each input line that it was
able to process before hitting the error. So potentially that could
account for a lot of dead rows. I think there is a hint on the COPY
reference page suggesting that you VACUUM in such a situation ...
regards, tom lane
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