Suggest changing dirhash defaults for FreeBSD 9.2.

[Sergey Kandaurov]

On 27 August 2013 16:41, Robert Burmeister
<Robert.Burmeister at 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.

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