Cant break perormance barrier

  • We keep running in circles. WP site with WP Supercache. httpd.conf is vetted and runs as expected. We get the same results no matter what the config may be. Most recent is this one:

    <IfModule prefork.c>
    StartServers 12
    MinSpareServers 5
    MaxSpareServers 20
    ServerLimit 60
    MaxClients 60
    MaxRequestsPerChild 160

    We cannot exceed a 6 second request time and some as long as 40 seconds.

    Dual Proc 4 core
    32GB RAM
    NFS (have tested local disk and has not made a difference)
    HW Brocade LB (least utilized algorithm)
    Cisco MSA firewall

    Separate clustered DB servers so no share resources.

    1K user stress test and its always the same.

    Any ideas.

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