99.9% mysqld Utilization Problem

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  • Albert Rossi

    99.9% mysqld Utilization Problem

    all,

    i have seen a couple of postings on the following issues which i have
    encountered and have struuggled with for a couple of days now.
    i apologize in advance if someone has already posted the resolution and i
    missed it.

    Problem Description:
    on a Dual i386 Architecture with RH9, MySQL 3.23.54a-11 (or its .56 upgrade)
    under heavy loads the mysqld process reaches 99.9% CPU Utilization (as
    viewed using top)
    and a second daemon is never forked and the database hangs.
    some people have indicated they need to kill -9 mysqld (although i do not
    have that problem).

    specifically my rig has:
    - two P3/866
    - 1GB RAM
    - have successfully upgraded to MySQL 3.23.56 using the RPMs
    - have sucessfully copied my-large.cnf settings to /etc/my.cnf
    - am using Mantis Bug Tracker (PHP) to connect
    - have Apache 2 that comes with RH9
    - have 600 global users reporting problems but heavy load is about 10-20
    concurrent

    this is my first Dual-RH server.
    previously, i have used all single processor P2, P3, & P4.

    can anyone shed some light on possible next steps.
    i would hate to have to pull production back to a Single Proc after having
    built a Dual and really do NOT want to even think about Win32 option.

    any help appreciated!

    - Alex


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