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What is Query overload?

Answer

Query overload is when a Joomla extension talks to the database too much. Joomla gets all of its data from a database, that is how it holds your personal information. Each conversation with the database is called a query. It is good practice to have the least amount of queries possible, 20 is a good number to stay under. While 20 is a nice plumb line, it is hard to stay close to when using advanced modules and components. Some developers are not programmers and don't optimize their database requests. Your site will suffer in high traffic situations if you don't have your queries under control. Caching is the starting point and reduction of page elements is the best approach.