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Date: Thu, 20 Dec 2007 15:12:14 -0200
From: "Alexandre Biancalana" <biancalana@gmail.com>
To: dima <_pppp@mail.ru>
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References: <8e10486b0712191207r5e256b84xf6cb0bbafc6cfd20@mail.gmail.com>
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Cc: freebsd-performance@freebsd.org, Mike Tancsa <mike@sentex.net>
Subject: Re: Re[2]: Bad performance when accessing a lot of small files
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On 12/20/07, dima <_pppp@mail.ru> wrote:
>
> Try to run this command while listing your large directory. You'll see that dirhash_mem will reach dirhash_maxmem. So, the value of dirhash_maxmem should be increased.
>
> One more hint. Mounting filesystems with -noatime option greatly improves read performance. Apply this also, if you haven't done this yet.

I already set this

 # zfs get atime backup
NAME    PROPERTY  VALUE   SOURCE
backup  atime     off     local