Date: Mon, 12 Jan 2004 19:33:34 -0600 From: Jon Noack <noackjr@compgeek.com> To: Peter Losher <Peter_Losher@isc.org> Cc: current@freebsd.org Subject: Re: FreeBSD 5.x performance tips (ISC) Message-ID: <40034AEE.5020004@compgeek.com> In-Reply-To: <200401121659.26614.Peter_Losher@isc.org> References: <200401121659.26614.Peter_Losher@isc.org>
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First place I'd look would be the performance@ list, but that's just me ;-). Jon On 1/12/2004 6:59 PM, Peter Losher wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > So, as many of you know ISC hosts a quad-Xeon server running FreeBSD 5.1 > (-p10 to be precise) which hosts half of ftp.freebsd.org, etc. Many of you > helped out with some teething pains w/ virtual memory sizes, and kernel > panics. Thanks :) > > The issue with the system now is that while the kernel is SMP-aware, and as I > watch 5.2-REL get downloaded today, this system is like the arm muscle that > is developed to lift that barbell, but not enough blood is getting > everywhere, so the barbell is slowly moving up while the muscle cramps like > hell. In this case the system is ~70% idle, and around 150 processes are > locked and the performance starts to seriously decrease at times. (Entropy > stops getting collected, etc.) Not a pretty sight. The CPU's are all > spinlocking on an I/O channel. so high I/O translates into artificial high > cpu and load averages. > > So where can I look for pointers on how I can squeeze better performance out > of this configuration? I already have the usual sysctl entries installed. > Any chance moving to 5.2 will help the situation? > > Best Wishes - Peter
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