Date: Tue, 8 Jul 1997 21:34:24 +1000 (EST) From: "Daniel O'Callaghan" <danny@panda.hilink.com.au> To: David Greenman <dg@root.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: news server behaviour Message-ID: <Pine.BSF.3.91.970708212910.869n-100000@panda.hilink.com.au> In-Reply-To: <199707081119.EAA08592@implode.root.com>
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On Tue, 8 Jul 1997, David Greenman wrote: > >730MB, sd1 is Quantum 1 GB. aha0 is 1542cf with 8Mbps scsi bus. > ... > >That all sounds reasonable, but I'm not so sure about the stats from top > >and systat -vmstat. Top shows innd (1.5.1) at 60-70% CPU (39% user, 50% > >system). Systat shows similar figures. > > > >Is the CPU utilisation normal for the situation? In a previous incarnation > >the box was a Linux machine doing the same job under a different admin, > >and CPU for innd was more like 5-20% with no readers. > > A couple of comments: FreeBSD might be accounting for the system CPU time > more accurately than Linux. I also see that you're using a 1542 with > 16MB > of RAM...which means that bounce buffers will be involved for about half of I forgot about the bounce buffers having an effect. I guess the best thing to do is dig out an ahc 2940 and see what the effect is (apart from constructing a "proper" news server) > the I/O. This could have a significant effect on system time when doing lots > of disk I/O. You didn't mention which version of FreeBSD you're using, but > you might want to try enabling the Pentium bcopy optimization if it's not > already enabled (make sure no npx0 flags are set). Is expire running? That > might help explain the high numbers. Expire is not running. FreeBSD version is 2.2.2-RELEASE. npx0 config is from GENERIC. How do I enable the bcopy optimization? Thanks, Danny
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