Re: Block-level CRC checks - Mailing list pgsql-hackers

From Jonah H. Harris
Subject Re: Block-level CRC checks
Date
Msg-id 36e682920810170913p3b4f0f65g433abcec52d029fa@mail.gmail.com
Whole thread Raw
In response to Re: Block-level CRC checks  (Greg Stark <greg.stark@enterprisedb.com>)
List pgsql-hackers
On Fri, Oct 17, 2008 at 12:05 PM, Greg Stark
<greg.stark@enterprisedb.com> wrote:
> Heikki had a clever idea earlier which was to have two crc checks- one which
> skips the hint bits and one dedicated to hint bits. If the second doesn't
> match we clear all the hint bits.

Sounds overcomplicated to me.

> The problem with that is that skipping the hint bits for the main crc would
> slow it down severely. It would make a lot of sense if the hint bits were
> all in a contiguous block of memory but I can't see how to make that add up.

Agreed.

-- 
Jonah H. Harris, Senior DBA
myYearbook.com


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