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How to solve a large number of sleep processes when mysql queries millions of data

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How to solve the problem of a large number of sleep processes when mysql queries millions of data: when jdbc queries more than 1 million of the data volume, mysql will have a large number of sleep processes, and then the program will be stuck there

How to solve a large number of sleep processes when mysql queries millions of data:
When you use jdbc to query data with a data volume of more than 1 million, mysql will have a large number of sleep processes, and the program will be stuck there.

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