Changes to the blog

In case you haven’t already noticed, I’ve made some changes to my blog recently. Nothing really significant or drastic, but things that have been on the TODO list for a while.

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EXPLAINing intermittent perf problems

We’ve all gotten the dreaded email/call from a user stating that a query is “slow sometimes”. If you’re lucky, the “sometimes” actually ends up being fairly consistent and you can fairly easily determine what’s happening (an errant cron job, for example). All too often though, the issue really is sporadic, fleeting, and indeterministic. So how do you track these down? And more importantly what do you do about them once found?

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