pg_autovacuum is a daemon, not something that get's run twice a day. I think that's what the question Matthew was getting @. I'm not sure what would happen to performance if pg_autovacuum was launched twice a day from cron, but you could end up in an ugly situation if it starts up.


On Jul 30, 2004, at 12:11 PM, Dan Langille wrote:

On Fri, 30 Jul 2004, Matthew T. O'Connor wrote:

Stephane Tessier wrote:

I think with your help guys I'll do it!

I'm working on it!

I'll work on theses issues:

we have space for more ram(we use 2 gigs on possibility of 3 gigs)
iowait is very high 98% --> look like postgresql wait for io access
raid5 -->raid0 if i'm right raid5 use 4 writes(parity,data, etc) for each
write on disk
use more transactions (we have a lot of insert/update without transaction).
cpu look like not running very hard

*php is not running on the same machine
*redhat enterprise 3.0 ES
*the version of postgresql is 7.3.4(using RHDB from redhat)
*pg_autovacuum running at 12 and 24 hour each day

What do you mean by "pg_autovacuum running at 12 and 24 hour each day"?

I suspect he means at 1200 and 2400 each day (i.e noon and midnight).

Dan Langille -

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