Re: Deteriorating performance when loading large objects

"=?iso-8859-1?Q?Vegard_B=F8nes?=" <vegard.bones@met.no> writes:
> I have a problem with large objects in postgresql 8.1: The performance of
> loading large objects into a database goes way down after a few days of
> operation.

> I have a cron job kicking in twice a day, which generates and loads around
> 6000 large objects of 3.7MB each. Each night, old data is deleted, so
> there is never more than 24000 large object in the database.

Are you sure you're deleting the large objects themselves (ie,
lo_unlink), and not just deleting some references to them?

A manual "vacuum verbose" on pg_largeobject might be informative.

            regards, tom lane