Today i found a weird issue when trying to activate a WordPress plugin. I always redirected to 404 Error Page (Not Found). This is the first time i met this error. In most case it is crash problem or PHP Fatal error, which is easily to fix. I tried to debug the Apache error log, Nginx error log and MySQL log. There were no error related to the issue.After doing debug for hours, i finally found the issue. It was a very slow query which is lead to exceed PHP max execution time. There are 3 … Read more...