Date: Wed, 5 Jul 2006 16:07:03 +0300
From: Eugeny N Dzhurinsky <bofh@redwerk.com>
To: pgsql-performance@postgresql.org
Subject: managing database with thousands of tables
Message-ID: <20060705130703.GA2428@office.redwerk.com>
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Hello!

I facing some strange problems with PostgreSQL 8.0 performance.
I have application which handles a lot of tasks, each task is keps in separate
table. Those tables are dropped and created again periodically (precisely -
when new task results came back from remote server). Also each table can have
hundreds of thousands records inside (but mostly they do have just few
thousands).

Sometimes I facing performance loss when working with database, and aafter I
performed vacuuming on entire database, i saw some tables and indexes in pg_*
schemas were optimized and hundreds of thousands records were deleted. Could
that be the reason of performance loss, and if so - how can I fix that?

I have pg_autovacuum up and running all the time

pg_autovacuum -d 3 -D -L /dev/null

but it seems pg_autovacuum does not do vacuuming on system tables.

-- 
Eugene Dzhurinsky