On Wed, 2006-06-14 at 11:52, Sriram Dandapani wrote:
> Hi
>
>
>
> I have a table into which data flows at a high rate say 2 million rows
> per hour. Every 15 minutes, these rows are processed and deleted.
>
> At any point in time, the row count for the table hovers around 500K
> (due to the deletes).
>
>
>
> I have set max_fsm_pages to about 2000000. I still see the
> pg_total_relation_size constantly reporting an increasing size.
>
>
>
> How do I know if autovacuum is reclaiming space or is my max_fsm
> setting plain wrong. (I understand that autovacuum marks tuples for
> reuse, but shouldn’t pg_total_relation_size take that into account)
I wouldn't really rely on just autovacuum to do this.
But, if you must, adjust the threshholds to have it trigger more easily.
Me personally, if I'm running a script that deletes 500,000 rows, I put
a vacuum at the end of it. That way you KNOW the vacuum got run.