On Wed, 2008-12-31 at 14:45 -0500, Greg Stark wrote:
> On 31 Dec 2008, at 13:21, Simon Riggs <simon(at)2ndQuadrant(dot)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.com
 PostgreSQL Training, Services and Support

In response to

• Re: lazy_truncate_heap() at 2008-12-31 19:45:18 from Greg Stark

pgsql-hackers by date

Next:	From: Simon Riggs	Date: 2009-01-01 17:54:33
	Subject: Re: lazy_truncate_heap()
Previous:	From: Robert Haas	Date: 2009-01-01 13:42:42
	Subject: Re: TODO items for window functions