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cPanel - Apache Global Configuration

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    cPanel - Apache Global Configuration cPanel - Apache Global Configuration Presentation Transcript

    • Apache Global Configuration
      Apache MPM (multi-processing modul) Common Directives
    • Apache Architecture
    • StartServers
      - No of Child Server Process created when starting Apache.
      - As the number of processes is dynamically controlled depending on the load, there is usually little reason to adjust this parameter.
    • Minimum Spare Servers
      • Minimum no of Child Server Process will remain exist even Apache got nothing to do (idle)
      • Tuning of this parameter should only be necessary on very busy sites
    • Maximum Spare Servers
      • Maximum no of Child Server Process will remain exist even Apache got nothing to do (idle)
      • Tuning of this parameter should only be necessary on very busy sites
    • Max Clients
      • The MaxClientsdirective sets the limit on the number of simultaneous requests that will be served
      • Any connection attempts over the MaxClients limit will normally be queued
      • Once a child process is freed at the end of a different request, the connection will then be serviced.
    • ServerLimit
      • This directive sets the maximum configured value for MaxClients for the lifetime of the Apache process.
      • If ServerLimit is set to a value much higher than necessary, extra, unused shared memory will be allocated
      • Highly recommend using the default setting unless you fully understand how it will interact with your Apache build and MaxClients setting.
    • MaxRequestsPerChild
      • The MaxRequestsPerChild directive sets the limit on the number of requests that an individual child server process will handle.
      • After MaxRequestsPerChild requests, the child process will die.
      • If MaxRequestsPerChild is 0, then the process will never expire.
    • Keep-Alive Timeout
      • The number of seconds Apache will wait for a subsequent request before closing the connection.
      • Once a request has been received, the timeout value specified by the Timeout directive applies.
    • Max Keep-Alive Requests
      • The MaxKeepAliveRequests directive limits the number of requests allowed per connection when KeepAlive is on.
      • If it is set to 0, unlimited requests will be allowed.
      • Its recommend that this setting be kept to a high value for maximum server performance.
    • Timeout
      • Amount of time the server will wait for certain events before failing a request
      • Example:
      • In mod_cgi, the length of time to wait for output from a CGI script
      • When reading data from the client, the length of time to wait for a TCP packet to arrive if the read buffer is empty