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

Re: Page Checksums + Double Writes

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Simon Riggs <simon(at)2ndquadrant(dot)com>, alvherre(at)commandprompt(dot)com, david(at)fetter(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Page Checksums + Double Writes
Date: 2011-12-23 17:42:42
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> An obvious problem is that, if the abort rate is significantly
> different from zero, and especially if the aborts are randomly mixed
> in with commits rather than clustered together in small portions of
> the XID space, the CLOG rollup data would become useless.

Yeah, I'm afraid that with N large enough to provide useful
acceleration, the cases where you'd actually get a win would be too thin
on the ground to make it worth the trouble.

			regards, tom lane

In response to


pgsql-hackers by date

Next:From: Peter EisentrautDate: 2011-12-23 17:51:38
Subject: Re: patch: bytea_agg
Previous:From: Robert HaasDate: 2011-12-23 16:56:52
Subject: Re: Page Checksums + Double Writes

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group