If you have an HTML Internet site, it probably uses a very small amount of resources due to the fact that it's static, but that isn't the situation with dynamic database-driven websites that use PHP scripts and provide far more functions. This type of websites produce load on the hosting server anytime anyone browses them, because the server requires time to execute the script, to access the database and then to provide the information requested by the visitor's browser. A famous discussion board, as an illustration, stores all usernames and posts in a database, so some load is generated every time a thread is opened or an end user searches for a particular name. If many people access the forum at the same time, or if every single search involves checking thousands of database entries, this may generate high load and affect the performance of the Internet site. In this regard, CPU and MySQL load data can provide you with info about the site’s overall performance, as you can compare the numbers with your traffic stats to make a decision if the website should be optimized or moved to another sort of hosting platform that'll be able to bear the high system load in case the Internet site is popular.