Loki v3.7.0 released on 26-03-2026
Loki v3.7.0 is out now. Operators and users will see scheduler, parsing and threading changes that can alter query and ingest behaviour.
See the release on GitHub for the full notes and upgrade guidance: grafana/loki v3.7.0.
What’s in this release
- Breaking changes to the engine scheduler: it is now aware of total compute capacity, parsed labels no longer override structured metadata, and worker threads are shared across all scheduler connections.
- Query engine and query-tee enhancements: query context for limit enforcement, a regexp parser for log queries, support for max/min and time-aggregation functions, segmentation keys/resolver, and multiple query-tee improvements (race tolerance, enable racing, query splitting and header forwarding).
- Storage and observability updates: dataobj partitioning by segmentation key, chunk deletion markers written to object storage, decoupled dataobj consumers, and new metrics (in-flight bytes, processed bytes/records, flush-failures and a flush-duration histogram).
Upgrade notes
- Three explicit breaking changes mean you should review scheduler-related configuration, label parsing and relabel rules, and test upgrades in staging to observe any behavioural changes in query or ingest scheduling and label processing.
- If the upgrade causes problems in production, roll back to your previous deployed version and investigate the scheduler and parsing changes in a controlled environment before retrying.
Share any comments on your experience upgrading or report issues you encounter so others can learn from the upgrade path.