Loki v3.7.3 released on 24-06-2026
Loki v3.7.3 is out now. Operators, query users and ingestion teams will see improvements to query accuracy and performance, higher ingestion throughput and storage hardening across the pipeline.
Review the full release notes on the Loki GitHub release page for complete details and upgrade guidance before you roll this into production.
What’s in this release
- LogQL and query-engine enhancements: new compute functions (SubstringInsensitive, IsMember, regexp, substr), case-insensitive regex optimisation, engine instrumentation and fixes that improve query correctness and observability.
- Query performance work: a results cache for the thor engine, deduplication when building final results, aligned query start and range-query timestamp handling, and options to disable cache for query_range requests.
- Ingestion and storage changes: bloom filter for ExceedsLimits checks, builder pool and flush manager for data objects, batching and a rate batcher, compaction planner and smarter stream sharding, plus several WAL replay and index-builder fixes.
Upgrade notes
- Breaking change (operator): the default for OpenShift stream labels has been switched — review your operator configuration before upgrading and adjust manifests or values as needed.
- Promtail removed: Promtail support has been dropped in this release; update your ingestion tooling and test changes in staging. Keep previous manifests and the prior release available so you can revert if necessary.
Tell us how the upgrade went and what you notice in queries or ingestion — share any surprises or problems so others can learn from your experience.
