Date: Sat, 27 Oct 2001 14:32:48 -0600 From: "Scott Gerhardt" <scott@gerhardt-it.com> To: "FreeBSD" <freebsd-questions@FreeBSD.ORG> Subject: Kernel and sysctl settings Message-ID: <KPEMLBLEMPMHGLJOCDEGOEGCCLAA.scott@gerhardt-it.com>
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Looking for recommendations on kernel and sysctl optimizations. I'm building a modest server to host HTTP, FTP, SQL and POP3 services. Running FreeBSD 4.4-Release on a PIII 1GHz with 640MB+ RAM (plan to keep increasing RAM). So far I have recompiled a "stripped down" kernel and added the following options to the kernel: maxusers 256 options NMBCLUSTERS=32768 The following links have given me some ideas on what parameters can be modified to enhance networking and performance: http://www.enteract.com/~robt/Docs/Articles/ip-stack-tuning.html http://www.daemonnews.org/200108/benchmark.html I don't want to start changing the defaults willynilly just because they can be changed without knowing the impact on performance and stability. Here are a few things I was thinking of changing: kern.ipc.somaxconn: 128 (change to 1024, 2048, or 4096) kern.maxfiles: 8232 (change to 32768 or 65536) net.inet.tcp.sendspace: 16384 (change to 32768) net.inet.tcp.recvspace: 16384 (change to 32768) vfs.vmiodirenable=1 **What does this do? Stability 1st and performance 2nd are key factors. Suggestions welcome please. _________________________________ Scott Gerhardt, P.Geo. Gerhardt Information Technologies _________________________________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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