| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Simon Riggs <simon(at)2ndQuadrant(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 13:30:23 |
| Message-ID: | 4B151A6F.1070605@enterprisedb.com |
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| Lists: | pgsql-hackers |
Bruce Momjian 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.
Unfortunately that's not true. You can crash, leading to a torn page,
and then start up the database and shut it down cleanly. The torn page
is still there, even though the last shutdown was a clean one.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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