Different thread states in query execution

dba.stackexchange https://dba.stackexchange.com/questions/58667

문제

My MySQL 5.1 based Intranet system is facing very bad performance during high load. When observed through MonYog, I found below thread states:

Thread states

We can simply understand the different thread state by its name. Can someone provide the

  • differences among these states?
  • Why "sending data" is taking 76%?

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