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Date:      Tue, 27 Aug 2013 17:40:00 +0400
From:      Sergey Kandaurov <pluknet@gmail.com>
To:        Robert Burmeister <Robert.Burmeister@utoledo.edu>
Cc:        freebsd-stable <freebsd-stable@freebsd.org>
Subject:   Re: Suggest changing dirhash defaults for FreeBSD 9.2.
Message-ID:  <CAE-mSOLCYRM0LRLRgmaEZN1u5ozttJZC3kWtw3Zarqik1N29zw@mail.gmail.com>
In-Reply-To: <521C9E85.4060801@UToledo.edu>
References:  <521C9E85.4060801@UToledo.edu>

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On 27 August 2013 16:41, Robert Burmeister
<Robert.Burmeister@utoledo.edu> wrote:
>
> I have been experimenting with dirhash settings, and have scoured the internet for other peoples' experience with it.
> (I found the performance improvement in compiling has forestalled the need to add an SSD drive. ;-)
>
> I believe that increasing the following values by 10 would benefit most FreeBSD users without disadvantage.
>
> vfs.ufs.dirhash_maxmem: 2097152 to 20971520
>
> vfs.ufs.dirhash_reclaimage: 5 to 50 or 60

vfs.ufs.dirhash_maxmem is further autotuned based on available physical memory.
See r214359 for details.

-- 
wbr,
pluknet



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