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    Aleph www_server or pc_server Not Responding During Peak Hours

    • Article Type: General
    • Product: Aleph
    • Product Version: 22

    Problem Symptoms:
    - pc_server or www_server stop responding to requests
    - No error message is displayed
    - Only after restarting the process, it starts working again
    - Max descriptors is set to a low number (under 1024). It can be checked using the command:
    ulimit -a | gr

    If the max descriptors value is too low, Aleph cannot open enough connections to serve all users and it therefore stops responding when it reaches the limit.

    Increase the max descriptors to 4096 from user root, using the command:
    projadd group.exlibris
    (Response) projmod -sK "process.max-file-descriptor=(priv,4096,deny)" group.exlibris

    Additional Information

    For Aleph to work and serve users, it opens connections in the OS. When there are many users, it opens many connections. If there is a limit to the number of connection then the Aleph processes will not be able to open (in Sun they are called files or descriptors)

    • Article last edited: 2/25/2014