From: Stan Hoeppner <stan@hardwarefreak.com>
To: xfs@oss.sgi.com
Subject: Re: XFS defragmentation issue
Date: Sun, 12 Sep 2010 04:45:30 -0500 [thread overview]
Message-ID: <4C8CA13A.6010103@hardwarefreak.com> (raw)
In-Reply-To: <20100912104321.5529f74c@galadriel.home>
Emmanuel Florac put forth on 9/12/2010 3:43 AM:
> Le Sat, 11 Sep 2010 14:38:48 -0500 vous écriviez:
>
>> That's good to know Dave. Thanks. I created a short-name script a
>> while back with "echo 3 > /proc/sys/vm/drop_caches" merely so I could
>> "clear the baffles" now and then.
>
> But isn't it somewhat risky? isn't there any risk of data loss by
> dropping cache at any moment?
From: http://linux-mm.org/Drop_Caches
This is a non-destructive operation and will only free things that are
completely unused. Dirty objects will continue to be in use until
written out to disk and are not freeable. If you run "sync" first to
flush them out to disk, these drop operations will tend to free more
memory.
--
Stan
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next prev parent reply other threads:[~2010-09-12 9:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-10 14:41 XFS defragmentation issue John Lister
2010-09-10 19:00 ` Stan Hoeppner
2010-09-11 6:55 ` John Lister
2010-09-11 8:23 ` Dave Chinner
2010-09-11 8:25 ` John Lister
2010-09-11 19:38 ` Stan Hoeppner
2010-09-11 19:57 ` Iustin Pop
2010-09-12 1:01 ` Dave Chinner
2010-09-12 8:43 ` Emmanuel Florac
2010-09-12 9:45 ` Stan Hoeppner [this message]
2010-09-13 8:05 ` Roel van Meer
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