Grafana Mimir 3.0 release: performance improvements, a new query engine, and more

Grafana Mimir 3.0 introduces a redesigned architecture that separates read and write operations using Apache Kafka as an asynchronous buffer, eliminating performance bottlenecks between ingestion and queries. The release features the Mimir Query Engine (MQE), which processes queries in a streaming fashion rather than bulk loading, reducing peak memory usage by up to 92%. These improvements deliver 15% lower resource usage in large clusters while maintaining faster query execution and higher reliability. The new ingest storage component ensures query spikes won't slow down data ingestion and vice versa, enabling independent scaling of each path.