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Apache Global Configuration. Apache MPM (multi-processing modul ) Common Directives. Apache Architecture. StartServers. - No of Child Server Process created when starting Apache.
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Apache Global Configuration Apache MPM (multi-processing modul) Common Directives
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