Re: Extent Locks

On Tue, May 28, 2013 at 9:07 AM, Stephen Frost <sfrost@snowman.net> wrote:
> * Jaime Casanova (jaime@2ndquadrant.com) wrote:
>> btw, we can also use a next_extend_blocks GUC/reloption as a limit for
>> autovacuum so it will allow that empty pages at the end of the table
>
> I'm really not, at all, excited about adding in GUCs for this.  We just
> need to realize when the only available space in the relation is at the
> end and people are writing to it and avoid truncating pages off the end-
> if we don't already have locks that prevent vacuum from doing this
> already.  I'd want to see where it's actually happening before stressing
> over it terribly much.

+1   autovacuum configuration is already much too complex as it
is...we should be removing/consolidating options, not adding them.

merlin