Re: Query does not use index

Martin Hampl <Martin.Hampl@gmx.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