Re: Block-level CRC checks

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: bruce(at)momjian(dot)us
Cc: Simon Riggs <simon(at)2ndQuadrant(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Aidan Van Dyk <aidan(at)highrise(dot)ca>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Block-level CRC checks
Date: 2009-12-01 12:58:08
Message-ID: 200912011258.nB1Cw8F02488@momjian.us
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bruce wrote:
> What might be interesting is to report CRC mismatches if the database
> was shut down cleanly previously; I think in those cases we shouldn't
> have torn pages.

Sorry, stupid idea on my part. We don't WAL log hit bit changes so
there is no guarantee the page is in WAL on recovery.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

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