Re: Advice on MyXactMade* flags, MyLastRecPtr, pendingDeletes and lazy XID assignment

On Thu, 2007-08-30 at 00:33 -0400, Tom Lane wrote:
> "Florian G. Pflug" <fgp@phlo.org> writes:
> > And I'm quite tempted to not flush the XLOG at all during ABORT, and to
> > only force synchronous commits if one of the to-be-deleted files is
> > non-temporary.
> 
> +1 on the first, but -1 on the second, because we'd have to track
> whether deleted files are temp or not ... it's very unclear that it'd
> be worth the trouble.

+1 to first: Aborts aren't particularly frequent actions, but having
them return faster makes sense if you have a session pool and people are
waiting to run another transaction.

-1 to second: If there are any temporary deleted files then it is
because we've done a large sort, hash join etc, so avoiding the sync
makes no difference to the overall response time. 

--  Simon Riggs 2ndQuadrant  http://www.2ndQuadrant.com