| To: | Radoslaw Garbacz <radoslaw.garbacz@xxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: xfs - high CPU usage when removing files |
| From: | Dave Chinner <david@xxxxxxxxxxxxx> |
| Date: | Tue, 14 May 2013 10:47:51 +1000 |
| Cc: | xfs@xxxxxxxxxxx |
| Delivered-to: | xfs@xxxxxxxxxxx |
| In-reply-to: | <CAHBw7oSxcTYEEFzzhpZfH_EshyYXOsRBpf=S+bLEgCyQZkLFsA@xxxxxxxxxxxxxx> |
| References: | <CAHBw7oSxcTYEEFzzhpZfH_EshyYXOsRBpf=S+bLEgCyQZkLFsA@xxxxxxxxxxxxxx> |
| User-agent: | Mutt/1.5.21 (2010-09-15) |
On Mon, May 13, 2013 at 01:28:47PM -0500, Radoslaw Garbacz wrote:
> Hi,
>
> I noticed a high CPU usage when removing files from XFS partition on Linux,
> CentOS (always close to 100%).
> Is it a known issue, or is it more likely to be attributed to my testing
> methodology ('time' command)?
If you are removing extremely fragmented files, then 100% CPU will
be seen. If you are removing tens of thousands of small files, then
100% CPU will be seen,
IOWs, if there's enough work to be done, removing files will use all
the available CPU. There's no problem with that.
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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