We suspect a memory glitch on our website (writen in PHP). Sometimes for no reason (know) the memory of the server goes up to almost 100%. Then the website become inaccessible and need to be restart. CPU plot are normal. Its a Virtual Server and we do not have access to Apache config but we can retrieve the Apache Log. You will be given access FTP, Apache Logs and the time the glitch happen. No access to the Cpanel will be given. The website is Wordpress. Team will have to identify where the glitch come from and correct the problem.