Date: Fri, 18 Mar 2005 19:26:40 +0100 From: =?iso-8859-2?Q?B=E1nhalmi_Csaba?= <banhalmi@field.hu> To: <freebsd-performance@freebsd.org> Subject: mbuf underrun, zombie process Message-ID: <000b01c52be8$076c43f0$0201a8c0@oxy>
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hi! i hope i'm writin' to the right list this time.. my problem is the following: my server has high traffic on 100mbit dedicated line (around 10-11,5mb/s all day) with approx ~100-120 tcp connection. the nic is an intel pro 100, used with polling. now..when i set my data proxy's tcp window size to optimal, the network traffic dies in 2-3hours and the process become zombie, can't even kill. when i use small or large tcp window size the data proxy is stable, however the traffic is not good, dsl users complain, high speed copy is slow, etc. i don't really know what to do, what sysctl should increase or anything, if anyone had same problem, please post.. my machine is a pc, amd 2000+, around 50-60% used cpu, 512 ram and this is the only high load process. i changed couple sysctl settings: kern.ipc.nmbclusters=32768 kern.polling.enable=1 kern.ipc.somaxconn=4096 net.inet.udp.maxdgram=32768 net.inet.tcp.inflight.enable=0 net.inet.ip.portrange.randomized=0 ps: i tried to increase nmbclusters (65536, 131072), increased somaxconn (8192) and tcp.recvspace/sendspace to 65536, but didn't helped.
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