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

Re: Writing Commit Status hint bits (was Re: [HACKERS] Constant WAL replay)

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: pgsql-patches(at)postgresql(dot)org
Subject: Re: Writing Commit Status hint bits (was Re: [HACKERS] Constant WAL replay)
Date: 2005-07-20 13:24:05
Message-ID: 15364.1121865845@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> On Tue, 2005-07-19 at 22:24 -0400, Tom Lane wrote: 
>> Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
>>> Short patch enclosed to turn off writing of commit-status hint bits.
>> 
>> Doesn't this entirely destroy the ability to truncate clog, and
>> therefore the ability to survive XID wraparound?

> I hope not for all our sakes, since the hint bits are not WAL logged and
> anything that relies upon them would be fragile.

We don't rely on any one write of them to work, but that doesn't mean
that we can indefinitely postpone writing them.

			regards, tom lane

In response to

Responses

pgsql-hackers by date

Next:From: Tom LaneDate: 2005-07-20 14:32:00
Subject: Re: Buildfarm issues on specific machines
Previous:From: Jeff TroutDate: 2005-07-20 12:58:59
Subject: Re: [HACKERS] Problems compiling Postgresql 8.0.3 on 10.4

pgsql-patches by date

Next:From: Simon RiggsDate: 2005-07-20 16:26:43
Subject: Re: Writing Commit Status hint bits (was Re: [HACKERS] Constant
Previous:From: Jeff TroutDate: 2005-07-20 12:58:59
Subject: Re: [HACKERS] Problems compiling Postgresql 8.0.3 on 10.4

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