Redis Exporter causing CPU spikes

[NirmalP29]

Redis server has zero keys.
The vm in screenshot has 4 CPUs
I have tested this in multiple azure vms and most of them shows cpu spikes due to redis exporter.

TOP command output

The top panel shows CPU total usage from node exporter
The middle panel shows "process_cpu_seconds_total" from redis exporter.
It also shows "redis_cpu_sys_seconds_total" and "redis_cpu_user_seconds_total" but both are flat (ie zero)
The bottom panel shows max single cpu utilization from node exporter.

INFO[0000] Redis Metrics Exporter v1.43.0 build date: 2022-06-18-11:52:03 sha1: 980a974 Go: go1.18.3 GOOS: linux GOARCH: amd64

Can someone help me debug why redis exporter is causing cpu spikes?

[bjosv]

We had the same problem a couple of month ago.
After a lot of investigations we found an issue with timers in the Go runtime, see golang/go#51654
You are likely affected by the same problem since you run Go 1.18.3

The problem is solved and merged in Go 1.19 and backported to 1.17.13 and 1.18.5

[oliver006]

INFO[0000] Redis Metrics Exporter v1.43.0 build date: 2022-06-18-11:52:03 sha1: https://github.com/oliver006/redis_exporter/commit/980a9741e77c4e065faba80805f93d4694d71d67 Go: go1.18.3 GOOS: linux GOARCH: amd64

@NirmalP29 - You're running a pretty old version of the exporter (that, according to @bjosv, was build with the buggy 1.18.3 Go runtime) - can you try upgrading and see if the issue is fixed?

[NirmalP29]

Thank you @oliver006 and @bjosv 😀. The issue is resolved after upgrading go and redis_exporter.