Skip site navigation (1) Skip section navigation (2)

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

From: Simon Riggs <simon(at)2ndquadrant(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Florian G(dot) Pflug" <fgp(at)phlo(dot)org>, Postgresql-Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Advice on MyXactMade* flags, MyLastRecPtr,pendingDeletes and lazy XID assignment
Date: 2007-08-30 21:01:25
Message-ID: 1188507685.4173.11.camel@ebony.site (view raw or flat)
Thread:
Lists: pgsql-hackers
On Thu, 2007-08-30 at 00:33 -0400, Tom Lane wrote:
> "Florian G. Pflug" <fgp(at)phlo(dot)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


In response to

Responses

pgsql-hackers by date

Next:From: Simon RiggsDate: 2007-08-30 21:02:08
Subject: Re: Advice on MyXactMade* flags, MyLastRecPtr,pendingDeletes and lazy XID assignment
Previous:From: korry.douglasDate: 2007-08-30 19:47:24
Subject: Re: enum types and binary queries

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group