Re: Why do we have a WAL record for CLOG page extension?

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: Why do we have a WAL record for CLOG page extension?
Date: 2006-06-06 14:59:59
Message-ID: 17347.1149605999@sss.pgh.pa.us
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Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> Why do we have a WAL record for CLOG page extension?

Think of it as being a substitute for a full-page image, or perhaps the
init-bit in heap-insert records is the closest analogy. Your patch is
unworkable because it provides no means for recovering from
corrupt-on-disk clog pages.

regards, tom lane

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