Date: Mon, 13 Feb 2006 18:47:08 +1100 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Kevin Oberman <oberman@es.net> Cc: stable@freebsd.org Subject: Re: Odd performance problems after upgrade from 4.11 to 6.0-Stable Message-ID: <20060213074708.GA705@turion.vk2pj.dyndns.org> In-Reply-To: <20060213022747.6878E45041@ptavv.es.net> References: <43A136C7.9040302@plab.ku.dk> <20060213022747.6878E45041@ptavv.es.net>
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On Sun, 2006-Feb-12 18:27:47 -0800, Kevin Oberman wrote: >This is not really a surprise. I know how running out of memory slows >things down. What does bother me is why it went from 6 hours in V4 14 >hours on V6. It could be that glimpse's memory access pattern makes it very sensitive to the available RAM and a slight reduction is causing a massive slowdown. >Unfortunately, my old box is going away in two weeks and I doubt that >I'll have much time to look at things before then. All I can say is >that either the wired memory for V6 is up so much that I page and swap a >lot mote or that the operations have slowed down way more than they >should have. Whilst you have access to the box, it might be useful to capture some of the VM subsystem information for both 4.x and 6.x (eg a couple of 'sysctl vm' at known intervals) under stress. This might help identify where the problem is. -- Peter Jeremy
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