If you have an HTML Internet site, in all probability it uses a really small amount of system resources simply because it's static, but that isn't so with dynamic database-driven Internet sites that use PHP scripts and provide considerably more functions. This sort of websites generate load on the hosting server when somebody browses them, simply because the server needs time to execute the script, to access the database and then to supply the content requested by the visitor's Internet browser. A popular discussion board, for instance, stores all usernames and posts within a database, so some load is generated each time a thread is opened or a user looks for a given phrase. If a lot of people access the forum concurrently, or if each and every search involves checking a large number of database entries, this may create high load and affect the performance of the website. In this regard, CPU and MySQL load statistics can present you with info about the site’s performance, as you can compare the numbers with your traffic data to decide if the site must be optimized or transferred to another sort of website hosting platform that'll be able to bear the high system load if the website is very popular.