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Re: trying to run PITR recovery

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Warren Little <Warren(dot)Little(at)MeridiasCapital(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: trying to run PITR recovery
Date: 2007-03-26 00:57:47
Message-ID: 1625.1174870667@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-admin
Warren Little <Warren(dot)Little(at)MeridiasCapital(dot)com> writes:
> I'm testing my PITR recovery procedures and something doesn't look  
> right.
> The following is from the logs upon starting postgres with  
> recovery.conf file in place

> @ 2007-03-23 05:57:33 MDTLOG:  restored log file  
> "000000010000011A000000FD" from archive
> @ 2007-03-23 05:57:35 MDTLOG:  incorrect resource manager data  
> checksum in record at 11A/FD492B20
> @ 2007-03-23 05:57:35 MDTLOG:  redo done at 11A/FD492210

> My concern is that there were many more logfiles to be played  
> following "00000010000011A000000FD"
> (ie 000000010000011E0000005C) yet it appears the recovery stop at  
> that point and called it good.

Perhaps you have a bad copy of that particular log segment file?
The "incorrect checksum" failure is normal in certain circumstances
(eg, where the system crashes partway through writing out a large
WAL record), which is why the code treats it as indicating the end
of WAL.  But in this case it looks more like corrupt data ...

			regards, tom lane

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