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The following page has been changed by MarcMongenet:
http://wiki.apache.org/httpd/ModuleLife

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   * Children processes are started, they may be forked, or not (Windows).
   * If the children are not forked, they repeat the whole startup, with 2 
configurations parsing.
   * On restart and graceful restart, the module is unloaded and reloaded/init, 
and the post_config hook is called one time.
+  * On graceful restart, new children processes may be running on the new 
configuration while old children on the old configuration are still serving a 
request.
  
  == 1st and next post_config calls ==
  In the post_config hook, we use apr_pool_userdata_get/set on the process pool 
to detect if we are called for the first time or not. Using a static variable 
does not work because the module may be unloaded/reloaded between the two 
calls. The process pool is not torn down between cycles.

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