Why does the cpu load cause the system to slow down?

cpu has a high load, which means there are more waiting processes, but cpu itself is idle or can handle other tasks, so why does the system change cards when the cpu load is high?


the high cpu load is not more waiting, but more cpu execution (such as being used by some improperly designed process), and many of the processes that should be executed are not assigned to cpu,.


cpu has a high load, which proves that it is too busy to queue up to perform tasks. And generally speaking, there are more things to calculate at this time, and if you don't have the energy to do anything else, you may feel stuck

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Message : Disk full (/tmp/#sql-temptable-64f5-1b30240-2b238.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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