Hello I am using nginx (proxy mode) in front of apache but sometimes about twice a day on high traffic time i got this error: 504 Bad gateway It seems that apache is not send back any results because of many connections and maybe is not able to process all requests fast. I am using: StartServers 15 MinSpareServers 15 MaxSpareServers 25 ServerLimit 512 MaxClients 384 MaxRequestsPerChild 1000 KeepAlive on KeepAliveTimeout 3 MaxKeepAliveRequests 100 TimeOut 100 Code (markup): How can i adjust these so i can get better results? Thank you