1.11 Redis Benchmarking

1. Benchmark a Lua Script

1. Load Lua with redis-cli

redis-cli -h 127.0.0.1 -p 6379 -a "xxx" -x script load < test.lua

2. Benchmark Lua with redis-benchmark

# 1 represents the number of keys
redis-benchmark -h 127.0.0.1 -p 6379 -a "xxx" -c 1000 -n 1000000 evalsha d72ab028ab5ff319cf0979291745f98c099cecb2 1 test 10

3. Benchmark a pipeline with redis-benchmark

redis-benchmark -h 127.0.0.1 -p 6379 -a "xxx" -c 1000 -n 1000000  -P 5 evalsha d72ab028ab5ff319cf0979291745f98c099cecb2 1 test 10

This command sends evalsha d72ab028ab5ff319cf0979291745f98c099cecb2 1 test 10 in batches of 5 commands. The final QPS should be divided by 5.

2. Benchmarking Notes

1. First benchmark Redis locally so network bottlenecks (bandwidth + latency) can be ignored.
2. redis-benchmark is also single-threaded. If CPU reaches 100%, multiple redis-benchmark processes can be started for the benchmark and their QPS values added together.
3. If there are other problems, capture packets with tcpdump and analyze them with Wireshark.

3. References

• Redis benchmark | Redis
• understand the redis benchmark
• Redis Performance Benchmark Tool redis-benchmark - Bill Zhang - CSDN
• Redis Network Bottleneck - Maimai