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Plesk, fcgi memory problems (leak?)

Discussion in 'Plesk 9.x for Linux Issues, Fixes, How-To' started by argonius, Jan 19, 2011.

  1. argonius

    argonius Basic Pleskian

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    Joined:
    Apr 28, 2010
    Messages:
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    Hi,

    we are running ~100 Domains on a Intel I7 CPU with 8GB of ram.
    After startup, the system has ~5GB of free ram. After a while, linux is taking much of them
    for caching, which is normal.

    Our domains are running with php in fcgi mode.

    After a while (~ 8h) I can see huge memory consumption from apache processes and many many
    old php processes.
    I played around with serveral fcgid.conf parameters, but without success.
    It seems that sometimes idle fcgi processes won't be killed :(

    here is my fcgid.conf:

    # added by psa-mod-fcgid-configurator
    LoadModule fcgid_module /usr/lib64/httpd/modules/mod_fcgid.so

    <IfModule mod_fcgid.c>
    SocketPath /var/lib/httpd/fcgid/sock
    </IfModule>

    # added by psa-mod-fcgid-configurator
    <IfModule mod_fcgid.c>
    IdleTimeout 600
    IdleScanInterval 240
    BusyTimeout 300
    BusyScanInterval 120
    ErrorScanInterval 6
    ZombieScanInterval 6
    ProcessLifeTime 3600
    SpawnScoreUpLimit 10
    SpawnScore 1
    TerminationScore 2
    MaxProcessCount 250
    DefaultMaxClassProcessCount 10
    DefaultMinClassProcessCount 0
    IPCConnectTimeout 30
    IPCCommTimeout 45
    DefaultInitEnv RAILS_ENV production
    </IfModule>



    Here are my settings for mpm_prefork (have to use prefork, cause
    webmail and others need mod_php ...)

    <IfModule prefork.c>
    StartServers 8
    MinSpareServers 5
    MaxSpareServers 20
    ServerLimit 256
    MaxClients 256
    MaxRequestsPerChild 4000
    </IfModule>



    I think, these value are acceptable.

    Does fcgid from psa has a memleak or something? Or has anybody a clue, how to get
    rid of old fcgi processes which aren't in use (i'd strace'd them)

    I am very thankful for any idea/help/guess ....


    Thanks,
    patrick
     
  2. fogelf

    fogelf Regular Pleskian

    23
    37%
    Joined:
    Feb 10, 2010
    Messages:
    103
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    0
    add new directivee in fcgid.conf

    <IfModule mod_fcgid.c>
    ..
    FcgidIdleTimeout 40
    FcgidProcessLifeTime 30
    FcgidMaxProcesses 20
    FcgidMaxProcessesPerClass 8
    FcgidConnectTimeout 30
    FcgidIOTimeout 45
    FcgidInitialEnv RAILS_ENV production
    FcgidIdleScanInterval 10
    FcgidMinProcessesPerClass 0 <<<<<<< without it timeouts are dummy
    ..
    </IfModule mod_fcgid.c>
     
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