Перезагрузка приложения FastCGI

Цитата из FAQ:

Applications started by mod_fastcgi can use the autoUpdate argument to FastCgiServer and/or FastCgiConfig (see the mod_fastcgi docs). A drawback to this approach is that, mod_fastcgi will check on every request for a new version of the application. A smarter implementation might have the application itself check periodically (either by number of requests handled or by time passed) and reload if a newer version of itself (or one of its libraries) exists. If a process manager, such as that embedded in mod_fastcgi, is responsible for the process, simply exiting will cause a new instance to be created.

Итак, вы либо включаете автоматическое обновление в конфигурации, либо ваша программа выполняет перезагрузку с помощью какого-либо механизма, который вам больше нравится.