Herouth Maoz wrote: > We found out that the table's response depends on the rate of ANALYZE being > performed. We have tuned the values in pg_autovacuum so that we have around > one analyze per minute. > > What is bothering me is that sometimes the auto vacuum daemon decides to > perform a vacuum analyze rather than just analyze. If it just does a vacuum > independent of the analyze, we don't see much impact on performance. But if > it does vacuum analyze, it means that until vacuum is over, it doesn't do > another analyze, and this may take about five minutes, in which our > performance under load conditions might deteriorate.
Hmm, this is an use case we never thought about. I don't think there's any way to coerce autovacuum into doing what you want it to do. I suggest you turn analyze off for this table (say by setting a very large scale factor), and analyze it manually through cron or something. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
