Re: Page Checksums - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: Page Checksums
Date
Msg-id 4EEDBE34.9010409@enterprisedb.com
Whole thread Raw
In response to Re: Page Checksums  (David Fetter <david@fetter.org>)
Responses Re: Page Checksums  (David Fetter <david@fetter.org>)
Re: Page Checksums  (Jesper Krogh <jesper@krogh.cc>)
List pgsql-hackers
On 18.12.2011 10:54, David Fetter wrote:
> On Sun, Dec 18, 2011 at 10:14:38AM +0200, Heikki Linnakangas wrote:
>> On 17.12.2011 23:33, David Fetter wrote:
>>> If this introduces new failure modes, please detail, and preferably
>>> demonstrate, just what those new modes are.
>>
>> Hint bits, torn pages ->  failed CRC. See earlier discussion:
>>
>> http://archives.postgresql.org/pgsql-hackers/2009-11/msg01975.php
>
> The patch requires that full page writes be on in order to obviate
> this problem by never reading a torn page.

Doesn't help. Hint bit updates are not WAL-logged.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com


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