| From: | "Steinar H(dot) Gunderson" <sgunderson(at)bigfoot(dot)com> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: PostgreSQL strugling during high load |
| Date: | 2005-05-13 13:00:37 |
| Message-ID: | 20050513130037.GB31454@uio.no |
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| Lists: | pgsql-performance |
On Fri, May 13, 2005 at 03:52:38PM +0300, Mindaugas Riauba wrote:
> Tables are not big (20000-150000 rows each) but have very high
> turnover rate - 100+ updates/inserts/deletes/selects per second.
> So contents of database changes very fast. Problem is that when
> pg_autovacuum does vacuum those changes slows down too much.
> And we keep autovacuum quite aggressive (-v 1000 -V 0.5 -a 1000
> -A 0.1 -s 10) to not bloat database and to avoid bigger impact.
> analyze seems not to impact performance too much.
Are you using the bgwriter?
See http://developer.postgresql.org/~wieck/vacuum_cost/ for details.
/* Steinar */
--
Homepage: http://www.sesse.net/
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