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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
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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

In response to

fsync and battery-backed caches at 2006-02-27 10:03:14 from Javier Somoza

Responses

Re: fsync and battery-backed caches at 2006-02-28 00:22:23 from Jim C. Nasby
Different disks for xlogs and data at 2006-02-28 09:45:45 from Javier Somoza

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