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Displaying posts with tag: MySQL overload (reset)

2 cases for MySQL server overload
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Your MySQL server is overloaded. You see hundreds of running queries in the SHOW PROCESSLIST taking many seconds to run, or can’t connect at all because all connections slots are busy. If you have worked with MySQL long enough you surely have seen it, probably more than once. This is what I would call “MySQL server overload” – having more work than the server can possibly handle. At this point I see people often jumping to the conclusion that something went wrong with MySQL and focus all their effort on this belief. This is also often how we see questions framed when they are filed with our Support or to Emergency Consulting.

In fact there are two very distinct causes for such a situation – and to find

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