Re: slow query makes MySQL halt
Posted by:
Rick James
Date: February 03, 2009 12:40AM
Strange. I've done a zillion SHOW PROCESSLISTs, often on sluggish systems, but have never seen this.
OTOH, there are reasons for things to stop -- involving locks between readers and writers, including the SQL thread of replication. (But I suspect you would have noticed that.)
It shouldn't matter, but what OS, what hardware, including disk? How much RAM? Are you at the point of swapping? Hmmm... Swapping is a no-no, so none of the machines I touch do such. Maybe that is your problem? If so, tune things to use less RAM.
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