Bartlomiej Plotka

TODO: Create design doc for that

That will make SerenityConfig incredible hard to test.. ):

Yes, I like it. It proven to work pretty well for us too.

Ideally, we start simpler with static buffers/types first before we move to sync.Pool, but can definitely improve a lot here. Help wanted!

Yes, I would see that as a potential gRPC API for our endpoints that Querier could merge. > We currently run https://github.com/thought-machine/prometheus-cardinality-exporter, but this requires ingesting metrics which further increases...

Yes 👍🏽

> blocks storage doesn't allow to append a sample whose timestamp is older than 1h compared to the most recent timestamp in the head. Really? Can we find code path...

Also, clock skew can cause it.

Thanks for the explanation. I think we are getting into the backfilling area. I think opening a side block and use vertical compaction would solve it.

We could start Prometheus discussion for it as well to enable that behavior if vertical compaction is enabled for TSDB itself.