Re: fork problem under load

From: Oliver (
Date: Fri 28 Jun 2002 - 18:55:22 UTC

  • Next message: Dave Cridland: "Re: fork problem under load"

    without knowing about the specifics of your problem I can inform you it is
    time you changed to a better mail server program. Try Postfix or Exim, both
    far more secure & reliable & efficient than sendmail.

    Upgrade to Postfix is normally fairly painless for sendmail users (I have
    done it without too many probs). Also there is a useful book (Postfix,
    Richard Blum, Sams). Anomy best invoked via procmail.

    Oliver Tickell.

    ----- Original Message -----
    From: <>
    To: <>
    Sent: Thursday, June 27, 2002 12:25 PM
    Subject: [anomy-list]: fork problem under load

    Greetings, Anomy folk

    After 9 months of perfect behavior, my anomy+sendmail box, a SunBlade 100
    running Solaris 8 began to fail in wierd ways when receiving mail to a
    large number of valid users.

    The problem manifests itself by bouncing a mail to a valid user with
    the error "user unknown." I would also see mail with a txt file
    attachment be quarantined by my Sophos scanner, claiming to be

    Digging into the sanitizer log, I saw

    /usr/local/bin/sanitize: fork: Resource temporarily unavailable

    So, I had apparently hit the max number of processes per user when
    dealing with this large stream of mails. I fixed it by increasing the
    maxuprc parameter in /etc/system and rebooting.

    Hopefully this will benefit other anomy-on-Solaris users.



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