MySQL performance drop with FC2 kernels

From: N T (fc.list_at_gmail.com)
Date: 11/30/04

  • Next message: Paul Bradshaw: "Re: change cyrus-imapd ssl certificate FC3" 
    Date: Tue, 30 Nov 2004 16:40:12 -0500
To: fedora-list@redhat.com

    I am seeing that performance using MySQL 4.1.7 drops by a significant
    amount if I use a FC2 kernel (2.6.8-1.521smp or 2.6.9-1.6_FC2smp)
    compared to running a stock 2.6.9 kernel downloaded from kernel.org.
    The vanilla kernel was compiled using the i686-smp config that FC2
    used. I see similar issues when running MySQL 4.0.xx. All MySQL
    versions were installed from the RPMs available from
    <http://www.mysql.com>.

    The benchmark being used to measure performance was RUBiS
    <http://rubis.objectweb.org/>. While vanilla 2.6.9 can service ~220
    reqs/s, FC2's version of 2.6.9 can only deliver ~120 reqs/sec.

    I have a Dell Poweredge with a hyperthreaded Pentium IV. However, I am
    not sure what other information might be relevant to narrow this
    problem. There was a thread on FedoraForum.org
    <http://www.fedoraforum.org/forum/archive/index.php/t-20064.html>
    about a similar problem but I did not see any resolution there.

    Any ideas?

    Thanks,
    Niraj 

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