Bug: Memory Spike in Distributor During Ingesters Flush

[KrishnaJyothika]

What is the bug?

We’ve observed a recurring memory spike in the Distributor component, where usage surges to 90–100% whenever the ingesters flush data after the upgrade to 2.14.2 version

Distributors utilizations

Ingesters utilizations

How to reproduce it?

1. Deploy mimir with 2.14.2 version
2. Push 60-65M load
3. Monitor Distributors and Ingesters utilizations - Every 2 hrs when ingesters flushes the data to Object storage distributors memory also spikes

What did you think would happen?

Whenever ingesters flushes the data to Object storage distributors memory also spikes up

What was your environment?

Kubernetes
Helm
Mimir 2.14.2

Any additional context to share?

No response