* [CHANGE] Remove `max_retries` from queue_config (it has been unused since rewriting remote-write to utilize the write-ahead-log). #5649
* [CHANGE] The meta file `BlockStats` no longer holds size information. This is now dynamically calculated and kept in memory. It also includes the meta file size which was not included before. tsdb#637
* [CHANGE] Renamed metric from `prometheus_tsdb_wal_reader_corruption_errors` to `prometheus_tsdb_wal_reader_corruption_errors_total`. tsdb#622
* [FEATURE] Add option to use Alertmanager API v2. #5482
* [FEATURE] Added `humanizePercentage` function for templates. #5670
* [FEATURE] Include InitContainers in Kubernetes Service Discovery. #5598
* [FEATURE] Provide option to compress WAL records using Snappy. [#609](https://github.com/prometheus/tsdb/pull/609)
* [ENHANCEMENT] Create new clean segment when starting the WAL. tsdb#608
* [ENHANCEMENT] Reduce allocations in PromQL aggregations. #5641
* [ENHANCEMENT] Add storage warnings to LabelValues and LabelNames API results. #5673