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Thread: Load Balancing , Death detection and Restart of JVM using mod_oprocmgr in 11i

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    Expert Oracle Administrator
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    Oct 2011
    New Delhi, India

    Load Balancing , Death detection and Restart of JVM using mod_oprocmgr in 11i

    The process manager (the mod_oprocmgr module) starts, stops, and detects death of processes (starting new processes to replace them), and provides load balancing services to the processes. mod_oprocmgr gets the topology management information via HTTP requests from internal servers such as JServ, and does it's job based on this information.

    How mod_oprocmgr Works with mod_jserv

    mod_oprocmgr provides new infrastructure capabilities, such as automatic starting of processes, death detection and restart, and load balancing.

    These capabilities are enabled by a new mode (auto) for the ApJServManual directive.

    Simply Edit the jserv.conf file:

    ApJServManual auto
    ApJServGroupMount /myservlet balance://mygroup/root
    * ApJServGroup mygroup 2 1 Oracle_Home/Apache/Jserv/etc/ (UNIX)

    This will loadbalance between 2 JVMs for 'mygroup'
    The same can be done for the JVMs of the oacore or forms (in servlet mode) group

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