Éppen az itt olvasottak miatt vettem le 0-ra:
By default, PHP FastCGI processes exit after handling 500 requests, and they may exit after this module has already connected to the application and sent the next request. When that occurs, an error will be logged and
500 Internal Server Errorwill be returned to the client. This PHP behavior can be disabled by settingPHP_FCGI_MAX_REQUESTSto 0, but that can be a problem if the PHP application leaks resources.
De nem volt jó 500, 5000 és 10000-es értékkel sem.