SMP on FreeBSD 6.x and 7.0: Worth doing?

[Mike Tancsa]

At 12:12 PM 12/24/2007, Scott Long wrote:
>For others who might want help with this, tweaking
>vfs.ufs.dirhash_maxmem is what is needed.  A bit of a balancing act is
>needed if you're on i386 since you'll risk exhausting KVA unless you
>also tweak KVA_PAGES.


Hi Scott,
         How does one know if the vfs.ufs.dirhash_maxmem is set too 
high and are exhausting KVA ? We set it quite high on our pop3/imap 
servers since Maildir can contain many small files.

eg

% sysctl -a vfs.ufs | grep -i dir
vfs.ufs.dirhash_minsize: 2560
vfs.ufs.dirhash_maxmem: 99097152
vfs.ufs.dirhash_mem: 59259609

         ---Mike


>Scott
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