Date: Fri, 30 Nov 2007 12:08:31 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: <freebsd-stable@freebsd.org>, <max@love2party.net>, "Pete French" <petefrench@ticketswitch.com> Subject: Re: Also seeing 2 x quad-core system slower that 2 x dual core Message-ID: <00e201c83349$b94ab7d0$b6db87d4@multiplay.co.uk> References: <E1IxvGp-000Mfu-Q7@dilbert.ticketswitch.com>
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sysctl -a |grep dirhash
Check vfs.ufs.dirhash_mem is not close to vfs.ufs.dirhash_maxmem if it is
and only most used boxes this seems to be the case increase maxmem.
Seems this could either do with an auto tune option or a larger max by
default in today's day and age.
Regards
Steve
----- Original Message -----
From: "Pete French" <petefrench@ticketswitch.com>
To: <freebsd-stable@freebsd.org>; <killing@multiplay.co.uk>; <max@love2party.net>
Sent: Friday, November 30, 2007 2:06 AM
Subject: Re: Also seeing 2 x quad-core system slower that 2 x dual core
>> Have you checked that your dir hash isn't suffering due to lack of memory
>> this can have a marked impact on seemingly trivial things like this as
>> could silly things like the RAID card being installed in a different slot.
>
> RAID card is onboard on these things - how would I check the dir hash ? The
> slower server has 16 gig of RAM, the faster one has 4 gig. Both were
> installed the same way in the same order, so should have the same disc layout
> more or less.
>
> -pete.
>
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