Re: improving write performance for logging

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Ian Westmacott <ianw(at)intellivid(dot)com>
Cc: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: improving write performance for logging
Date: 2006-01-06 20:27:46
Message-ID: 22489.1136579266@sss.pgh.pa.us
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Ian Westmacott <ianw(at)intellivid(dot)com> writes:
> If the WAL is lost, can you lose more than the data since the last
> checkpoint?

The problem is that you might have partially-applied actions since the
last checkpoint, rendering your database inconsistent; then *all* the
data is suspect if not actually corrupt.

regards, tom lane

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