Roman Havrylyak wrote:
>
> Suppose we have table with indexes, attached triggers, and finnaly alot of
> records (more then 100,000). Records are adding continuously.
>
> Once a month you have to do archiving of records. Simple INSERT INTO ARCHIV
> followed by DELETE and then VACUUM take alot of time, offen even hang up
> sessions. Dropping triggers and indexes is bad due to the continuously
> adding records.
>
> Is there any ways to solve problems?
Try TRUNCATE TABLE instead of DELETE. It won't fire your triggers,
will instantaneously remove all of your records, and if you choose
to perform a 'VACUUM ANALYZE foo;' afterwards to update the
statistics, they will be updated instantly. I'm guessing 95% of the
time used in your situation is VACUUM reclaiming the space used by
the DELETE.
Hope that helps,
Mike Mascari
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