Sometimes the query is fast, other times it times out

Sometimes I can execute a particular query and the it returns the result on the webpage very quickly. Other times the same query eventually times out and gives a 500 Server Error. This happens even when the traffic to the website may only have about 30 people on it. Does this have to do with how many other transactions the mySQL server is attempting to handle at the same moment I am trying to get results? Or is this likely the result of something else?

Is there something I can do to troubleshoot this?

Thank you!

It is hard to say. You should start reading your logs and see if there’s something in common when the query times out. It is likely that the page that it is most visited at that moment may cause the problem.

You could also use MySQL’s Explain instruction to tests your queries and see if any of them has any issues.

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