mbuf underrun, zombie process

From: Bánhalmi Csaba (banhalmi_at_field.hu)
Date: 03/18/05

  • Next message: Brian Reichert: "Re: mbuf underrun, zombie process" 
    To: <freebsd-performance@freebsd.org>
Date: Fri, 18 Mar 2005 19:26:40 +0100

    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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  • Next message: Brian Reichert: "Re: mbuf underrun, zombie process"