On Mon, Jan 18, 2010 at 1:47 PM, Reid Thompson <reid.thompson@ateb.com> wrote:
> Does this max_fsm_pages value seem OK for a 46GB database?
> I've clustered all the tables that seemed to be exhibiting large amounts
> of bloat.
My big DB is about 70 on disk. I have fsm pages set to 3.4 million,
and occasionally that gets overrun. It is nearly catastrophic to us
when that happens as performance takes a serious nose dive. This is
probably the major reason switching to 8.4 is high on our list. Our
DB has a *lot* of data churn, and that makes a lot of pages with space
on them to track.
One more thing you may wish to consider is running re-index on your
tables. I found that a lot of pages with empty space were compacted
and the number of fsm entries went down significantly when I did this
last week. For me this was more important than running cluster to
pack the data tables themselves.