Shulou(Shulou.com)06/02 Report--

Environment introduction

The server where the client program resides is windows,4 core CPU

The server database server is linux,16 core CPU

Experimental phenomenon

The client has a program window with 5 threads corresponding to the process. The phenomenon is as follows

There are 5 process in the database server, each process consumes CPU 100%. The duration of the first 4 process is 5 minutes, the last process is 3 minutes, and the duration of all the process in the database server is 10 minutes.

The client has a program window with 4 threads corresponding to the process. The phenomenon is as follows.

There are 4 process on the database server, and each process consumes CPU 100%. The running time of the 4 process on the database server is up to 4 minutes.

The summary is as follows:

The client only has 4 cores of CPU. If there are 5 threads, the client can only run 4 threads and then the remaining thread. Each thread has an exclusive core CPU, which takes up the same amount of CPU time. In this way, running 4 threads on the client is half the time of running 5 threads, and running 8 threads is the same as running 5 threads.

But on the database server linux, there are five process,4 process running at once, and then the last process. When the process on the server is finished, the client program is also finished.

The number of threads should first be less than the number of cpu cores on the server, and then it is better to be less than or equal to the number of cpu cores of the client (if it is more than the cpu core of the client, then the client itself is in the waiting queue)

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