Thanos Ruler querying Thanos Query Frontend instead of Thanos Querier

[jaanhio]

I am currently facing an issue where Thanos Querier is hitting a performance bottleneck due to the amount of queries from Thanos Ruler.

In this case, is it a good idea to have Thanos Ruler query Thanos Query Frontend instead? my concern is the querying of stale metrics for alerting but not 100% sure if that will be an issue.

Look forward to advice on this!

[yeya24]

Hi @jaanhio, it doesn't help IMO. Thanos Query Frontend works well for Range Query. However, the Rules related queries are simply instant queries that cannot be split and cached by Query Frontend. So I think there is no performance improvement of using it.