Our business is using a 1&1 (Plesk Panel) dedicated server to run our Wordpress websites. For a while now we are experiencing performance problems which result in occasional crashes of the server. The main problem is one massive WordPress site that needs frequent database repair. We were told to optimize the server settings to allow increased use of virtual memory but without further information how to proceed. We are not LINUX specialists and need someone to help us increasing the performance of the system. We have increased the size of RAM but without noticeable impact.