Re: Cost of XLogInsert CRC calculations

From: Manfred Koizar <mkoi-pg(at)aon(dot)at>
To: "Mark Cave-Ayland" <m(dot)cave-ayland(at)webbased(dot)co(dot)uk>
Cc: "'Tom Lane'" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "'Greg Stark'" <gsstark(at)mit(dot)edu>, "'Bruce Momjian'" <pgman(at)candle(dot)pha(dot)pa(dot)us>, <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Cost of XLogInsert CRC calculations
Date: 2005-05-31 17:58:35
Message-ID: sg8p91hdhbpqtipc0i8c0ssgs9km10bbkn@email.aon.at
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On Tue, 31 May 2005 12:07:53 +0100, "Mark Cave-Ayland"
<m(dot)cave-ayland(at)webbased(dot)co(dot)uk> wrote:
>Perhaps Manfred can tell us the generator
>polynomial that was used to create the lookup tables?

32 26 23 22 16 12 11 10 8 7 5 4 2 1
X + X + X + X + X + X + X + X + X + X + X + X + X + X + 1

-> http://www.opengroup.org/onlinepubs/009695399/utilities/cksum.html

Or google for "04c11db7".

Servus
Manfred

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