Default value checkpoint_completion_target

From: Rodrigo Barboza <rodrigombufrj(at)gmail(dot)com>
To: pgsql-performance <pgsql-performance(at)postgresql(dot)org>
Subject: Default value checkpoint_completion_target
Date: 2013-04-12 21:40:43
Message-ID: CANs8QJbHfn61hfFG25HU2gGD70msiXa_ms+6EU3RkFLD+is62A@mail.gmail.com
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Hi guys.
I read in some forums that this parameter is better to set it to something
like 0.7.
Mine is default (0.5) and sometime it logs the message:
WARNING: pgstat wait timeout

Could there be any relation between this parameter and the warning message?
Is it safe to set it to 0.7?

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