The CPU load is dependent upon the length of time a hosting server spends executing a script every time a visitor opens a page on a specific script-driven site. Static HTML websites use barely any CPU time, but it's not so with the much more sophisticated and functional scripts, that use a database and display dynamic content. The more individuals open this type of a website, the more load shall be generated on the hosting server and if the database is very large, the MySQL server will be loaded as well. An illustration of what can cause high load is an Internet store with a huge number of products. If it's popular, lots of people will be exploring it simultaneously and if they seek out items, the entire database containing all the products shall also be constantly accessed by the script, resulting in high load. In this light, having CPU and MySQL load statistics will offer you an idea of how the site is doing, if it needs to be optimized or if you simply need a more potent website hosting solution - if the Internet site is really popular and the established setup can't cope with the load.