Tom,
> > If you don't mind running a slightly customized version, you might try
> > back-patching this fix:
> > http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/commands/async.c.diff?r1=1.91&r2=1.91.2.1
> > into 7.2.4 and see if that improves matters.
>
> I'll give that a shot.
It patched cleanly except for the version header. I've been running it for about 36 hours now with no problems. I'd say that I'm about 85% convinced that it made the difference, as I've also done some optimizations since then that reduce the database load by caching.
I'd say that this patch is a candidate for 7.2.5 if there's ever another 7.2 release.
thanks for your help.
eric