How to figure out why the server started to slow down? How to do profiling?

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jimani2018-07-25 14:01:23

Performance evaluation

jimani, 2018-07-25 14:01:23

There are servers, there are several web applications. Started to slow down. In the application logs, there seems to be nothing unusual.

Where to start looking for the cause, what to watch and how?

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poisons, 2018-07-25
@poisons

htop/iotop don't show anything interesting?