Today when I pushed message to the redis list at a frequency of 400hz in Project A, and poped up message in Project B, the printing on the terminal in Project B was too slow.

Why?

Firstly, I checked the speed of consumer, it is normal, the redis list is always empty or less than 3 item.

Next I notice the producer’s frequency was far less than 400hz, then I delete code step by step, when I delete the code for push message to the redis list, the frequency become normal.

Test in the producter’s node

  • Run the following command in the producter’s node termial. 
    redis-benchmark -t set -n 100000 -q -a "xxx" -h xxx.xxx.xxx.xxx -p xxxx
  • Response from the redis server. 
    SET: 1386.19 requests per second
SET: 6042.30 requests per second
SET: 3402.52 requests per second
SET: 1163.06 requests per second
SET: 2050.44 requests per second

Test in the redis container

  • Run the following command in the redis container’s termial. 
    redis-benchmark -t set -n 100000 -q -a "xxx" -p xxxx
  • Response from the redis server. 
    SET: 161290.33 requests per second, p50=0.255 msec

It is obveriously, the network bandwide slows down the speed of push message to the redis server.