Re: testing HS/SR - 1 vs 2 performance - Mailing list pgsql-hackers

On Tue, 2010-04-27 at 18:08 -0400, Tom Lane wrote:
> Simon Riggs <simon@2ndQuadrant.com> writes:
> > On Tue, 2010-04-27 at 17:24 -0400, Tom Lane wrote:
> >> I think we should just lose that test, as well as the variable.
> 
> > Yes, though it looks like it is still necessary in creating a valid
> > initial state because otherwise we may have xids in KnownAssigned array
> > that are already complete.
> 
> Huh?  How is a filter as coarse as an oldest-running-XID filter going
> to prevent that?  And aren't we initializing from trustworthy data in
> ProcArrayApplyRecoveryInfo, anyway?
> 
> I still say it's useless.

Quite possibly. Your looking at other code outside of this patch. I'm
happy that you do so, but is it immediately related? I can have another
look when we finish this.

-- Simon Riggs           www.2ndQuadrant.com