| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Greg Stark <stark(at)mit(dot)edu> |
| Cc: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Peter Geoghegan <pg(at)heroku(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Another possible corruption bug in 9.3.2 or possibly a known MultiXact problem? |
| Date: | 2014-02-28 10:48:42 |
| Message-ID: | 20140228104842.GJ15628@awork2.anarazel.de |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On 2014-02-28 10:44:14 +0000, Greg Stark wrote:
> On 28 Feb 2014 06:19, "Andres Freund" <andres(at)2ndquadrant(dot)com> wrote:
> > Generally the LSN is computed when writing, not when a buffer is
> > modified, so that's not particularly surprising. It'd be interesting to
> > see what the records are that end on those LSNs.
>
> The checksum you mean? But that's why I ran checkpoint.
The checksum is computed in a copy of the buffer, not in the
original. C.f. PageSetChecksumCopy().
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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