yacenty Posted October 28, 2009 Posted October 28, 2009 Hello, Do You know what are and what is the source of "D" processes in the htop application? Recently I had notticed that in the peak time from time to I get about 10 to 30 mysql processes marked as "D" - then load goes from 20 to 40 and when D processes are runing only 4 processes are active and CPU usage is about 50-60% then just after the ammount of D processes goes to 0 then I see about 90-120 active processes and CPU usage is 100% on every core of QUAD processor. What could be done to avoid these "D" processes. Have You notticed such problem? I read that it could be caused by huge disk access needs by mysql process, but during this time - mysql disk access is very low - I mean iostat logs very minor ammount of blocks that are written to the hard drive. What is going on?
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