What is the best way to troubleshoot why sometimes a query will return results in one second, while sometimes it will take over ten seconds? In fact, sometimes the webpage that makes use of the query will time out. I can understand if my query was poorly written and, if so, then it should consistently run slow. Right? I tail the Apache error log, looking for clues when this sporadic event happens, and it doesn't ever record anything when it does. Thank you!