checkpoint write errors

From: CS DBA <cs_dba(at)consistentstate(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: checkpoint write errors
Date: 2016-10-21 15:49:11
Message-ID: ea6993d1-3d09-e238-88a1-0a0a6edd5405@consistentstate.com
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Hi all;

we're seeing the below errors over and over in the logs of one of our
postgres databases. Version 8.4.22

Anyone have any thoughts on correcting/debugging it?

Maybe I need to run a REINDEX on whatever table equates to
"base/1029860192/1029863651"? If so how do I determine the db and table
for "base/1029860192/1029863651"?

LOG: checkpoint starting: time
ERROR: xlog flush request 2571/9C141530 is not satisfied --- flushed
only to 2570/DE61C290
CONTEXT: writing block 4874 of relation base/1029860192/1029863651
WARNING: could not write block 4874 of base/1029860192/1029863651
DETAIL: Multiple failures --- write error might be permanent.

Thanks in advance

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