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  • Bug#263445: sendmail: high cpu usage

    From Richard A Nelson@1:229/2 to Martin on Tue Aug 17 00:30:13 2004
    From: [email protected]

    On Mon, 9 Aug 2004, Martin wrote:

    I'll bet it is the lmtp MDA that is causing your problem... I'm running >sendmail+mimedefang+spamassassin+clamav+procmail on four boxes, one of >which is the mail gateway(heavy usage) and have not been able reproduce >anything like this... but then, I'm not running cyrus for delivery


    I've been using cyrus for a couple years too, without a glitch, on a
    server with an average load >4..
    I split the load over a couple machines and now cyrus delivery is over
    tcp instead of unix sockets. That's the only big difference along with extensively using milters (clamav+milter-ahead/spamc) instead of
    mailscanner and upgrading from 8.12.10.

    I just recently switched from clamav-milter & spamass-milter to
    mimedefang who calls clamdscan and spamassassin directly - seems to
    less load & gives more configurability

    add -OLogLevel=15 to DAEMON_PARMS=""; in /etc/mail/sendmail.conf and
    check the logs for clues when this happens again.

    Please also check that libdb4.2 is using FCNTL locking, not FLOCK
    Lastly, if you don't need LDAP, you might try building without that.

    Ok, I will enable logging on one of the boxes. libdb4.2 is using FCNTL.
    And I do need LDAP. But I will also give 8.13.1 a try since it's out.

    Ok, I'm using LDAP as well - any news on this ?

    --
    Rick Nelson
    <knghtbrd> Nintendo Declares GCN Most Popular Console Ever
    <knghtbrd> Who are they kidding?
    <Mercury> knghtbrd: Stock holders?



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  • From Martin@1:229/2 to All on Wed Aug 4 16:00:12 2004
    From: [email protected]

    Package: sendmail
    Version: 8.12.11.Final-5
    Severity: important

    top shows 99.8% cpu usage for hours:
    16718 root 25 0 4780 2808 3404 R 99.8 0.2 758:08.18 sendmail:
    MTA: smtp.interne.: idle
    strace/ltrace show no activity.
    Usually happens some time (~1/2h) after a reload.
    It's always showing "MTA: smtp.interne.: idle" (cyrusv2 lmtp)
    The package has been built on woody using gcc-2.95-4/libc6-dev
    2.2.5-11.5 with SM_BUILD_OPT="noauth notls"
    It goes away when I SIGTERM the process and won't have any more problems
    till the next reload.

    -- System Information
    Debian Release: 3.0-bunk-2
    Kernel Version: Linux mx1 2.6.7-1-686-smp #1 SMP Thu Jul 8 06:08:37 EDT
    2004 i686 unknown

    Versions of the packages sendmail depends on:
    ii adduser 3.49 Add and remove users and groups
    ii libc6 2.2.5-11.5 GNU C Library: Shared libraries and
    Timezone
    ii libdb4.2 4.2.52-14.back Berkeley v4.2 Database Libraries [runtime]
    ii libldap2 2.0.27-3.bunk OpenLDAP libraries (without TLS support).
    ii liblockfile1 1.03 NFS-safe locking library, includes
    dotlockfi
    ii libwrap0 7.6-9 Wietse Venema's TCP wrappers library
    ii m4 1.4-14 a macro processing language
    ii perl 5.6.1-8.7 Larry Wall's Practical Extraction and
    Report
    ii rmail 8.12.11.Final- UUCP remote mail handler
    ii sensible-mda 8.12.11.Final- Mail Delivery Agent wrapper


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