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Old 11th August 2009, 12:02
MrM MrM is offline
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Just to clarify my reasoning as to why I thought MySQL was not the culprit here, but rather a consequence. As you can see in the (first two) attachments to this post, MySQL thread count was more or less stable at about 2 throughout the past month, and never exceeded 10. When the overload happened last night at around midnight it shot up to over a 100.

In the third attachment (memory usage), you can see a strange thing happening. Apparently last night after I rebooted the server, swap usage grew rapidly to about 1G, then dropped at around 5 AM.

P.S.: All times are GMT+2 (Paris time).
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