Date: Fri, 30 Nov 2007 09:44:30 -0500 From: Jim Pingle <lists@pingle.org> To: Pete French <petefrench@ticketswitch.com> Cc: freebsd-stable@freebsd.org Subject: Re: Also seeing 2 x quad-core system slower that 2 x dual core Message-ID: <475021CE.1000708@pingle.org> In-Reply-To: <E1IxvGp-000Mfu-Q7@dilbert.ticketswitch.com> References: <E1IxvGp-000Mfu-Q7@dilbert.ticketswitch.com>
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Pete French wrote: >> 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. This may be a silly question, but have you tried reducing the RAM on the quad core machine to 4GB so the machines match in that respect as well? I seem to recall a thread a while back about someone who had slowdowns in a certain situation with large amounts of RAM (>4GB). Jim
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