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This article mainly introduces Redis how to open IO multithreading, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Enable IO multithreading

Before the "Redis 6" version, Redis was "single-threaded" to read, parse, and execute commands. Starting with Redis 6, IO multithreading was introduced.

The IO thread is responsible for reading commands, parsing commands, and returning results. When enabled, the IO performance can be effectively improved.

I drew a diagram for your reference.

As shown in the figure above, the main thread and the IO thread jointly participate in the reading, parsing, and result response of the command.

The "main thread" can execute the command.

The IO thread is turned off by default. You can change the following configuration of redis.conf to enable it.

Io-threads 4io-threads-do-reads yes

"io-threads" is the number of IO threads (including the main thread). I suggest you set different values for stress testing according to the machine and take the optimal value.

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