Update 12/12/2010: Now i finally have the clues. It was plugins fault. Now i break to debug all the plugins query to the database.From my previous post 504 Gateway Timeout With Nginx And Apache, i still having the same issue. But now i finally breakdown to what exactly cause it. Nginx will produce 504 gateway timeout error when the Apache response time reach the nginx proxy timeout. And what cause the Apache slow to response to the request, is the MySQL database slow query and high memory … Read more...