Re: lazy_truncate_heap()

On Wed, 2008-12-31 at 14:45 -0500, Greg Stark wrote:
> On 31 Dec 2008, at 13:21, Simon Riggs <simon@2ndQuadrant.com> wrote:
> >
> > Both of these bugs are minor, but the effect of either/both of them is
> > to cause more AccessExclusiveLocks than we might expect.
> >
> > For Hot Standby this means that many VACUUMs take AccessExclusiveLocks
> > on relations, which would potentially lead to having queries cancelled
> > for no reason at all.
> 
> Well by default it would just cause wal to pause briefly until the  
> queries with those locks finish, no?

Yes, but why allow pointless actions in the first place?

-- Simon Riggs           www.2ndQuadrant.comPostgreSQL Training, Services and Support