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Re: Warm standby problems

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "David F(dot) Skoll" <dfs(at)roaringpenguin(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Warm standby problems
Date: 2009-10-26 20:04:34
Message-ID: 14941.1256587474@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-admin
"David F. Skoll" <dfs(at)roaringpenguin(dot)com> writes:
> I have one PostgreSQL 8.3 machine feeding WAL files to another PostgreSQL 8.3
> machine that's running in recovery mode.  However, fairly often (every
> few days), the standby machine breaks out of recovery mode with log messages
> like:

> 2009-10-23 21:47:40 EDT LOG:  incorrect resource manager data checksum in record at 11/4E5AA18C

> I'm pretty sure the WAL is shipped correctly (it's shipped via SCP).
> The only thing I can think of is that the shipping version is 8.3.7 and
> the consuming version is 8.3.8.  Would this be enough to cause the
> "incorrect checksum" message?

No; there's no WAL change between 8.3.7 and 8.3.8.  What seems more
likely is that you're somehow shipping the WAL files before they're
quite finished.

			regards, tom lane

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