Redis single thread and multi thread

redis Service process ：
1、redis Receive client requests
2、 The Internet IO Parsing requests into commands
3、 Execute the command and return

Generally speaking redis It's single threaded , refer to redis Processing requests 、 analysis 、 Executing commands is done by a single thread , But operations such as cleaning up expired data are still done by multithreading

6.0 Before the release

 The whole process is completed by single thread 

6.0 After the version Not on by default

 After the main thread receives the request , The Internet IO The parsing work is left to other threads , It is parsed into commands and finally handed over to the main thread for execution 

Redis The multithreading part is only used to process network data reading and writing and protocol parsing , The execution command is still executed in a single thread sequence