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Re: fsync and battery-backed caches

From: Tino Wildenhain <tino(at)wildenhain(dot)de>
To: Javier Somoza <jsomoza(at)pandasoftware(dot)es>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: fsync and battery-backed caches
Date: 2006-02-27 10:12:57
Message-ID: 4402D0A9.7080705@wildenhain.de (view raw or flat)
Thread:
Lists: pgsql-performance
Javier Somoza schrieb:
> 
>         Hi all
> 
>         Is it secure to disable fsync havin battery-backed disk cache?
>                
>         Thx
> 
No. fsync moves the data from OS memory cache to disk-adaptor
cache which is required to benefit from battery backup.

If this data is written to the plates immediately depends on settings
of your disk adaptor card.

Regards
Tino

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