Added CHANGELOG entry

Signed-off-by: Marco Pracucci <[email protected]>

Author: pracucci

CHANGELOG.md

@@ -40,6 +40,7 @@
   * `memberlist_client_messages_to_broadcast_dropped_total`
 * [ENHANCEMENT] Alertmanager: Added `-alertmanager.max-dispatcher-aggregation-groups` option to control max number of active dispatcher groups in Alertmanager (per tenant, also overrideable). When the limit is reached, Dispatcher produces log message and increases `cortex_alertmanager_dispatcher_aggregation_group_limit_reached_total` metric. #4254
 * [ENHANCEMENT] Alertmanager: Added `-alertmanager.max-alerts-count` and `-alertmanager.max-alerts-size-bytes` to control max number of alerts and total size of alerts that a single user can have in Alertmanager's memory. Adding more alerts will fail with a log message and incrementing `cortex_alertmanager_alerts_insert_limited_total` metric (per-user). These limits can be overrided by using per-tenant overrides. Current values are tracked in `cortex_alertmanager_alerts_limiter_current_alerts` and `cortex_alertmanager_alerts_limiter_current_alerts_size_bytes` metrics. #4253
+* [ENHANCEMENT] Store-gateway: added `-store-gateway.sharding-ring.wait-stability-min-duration` and `-store-gateway.sharding-ring.wait-stability-max-duration` support to store-gateway, to wait for ring stability at startup. #4271
 * [BUGFIX] Purger: fix `Invalid null value in condition for column range` caused by `nil` value in range for WriteBatch query. #4128
 * [BUGFIX] Ingester: fixed infrequent panic caused by a race condition between TSDB mmap-ed head chunks truncation and queries. #4176
 * [BUGFIX] Alertmanager: fix Alertmanager status page if clustering via gossip is disabled or sharding is enabled. #4184
@@ -49,6 +50,7 @@
 * [BUGFIX] Ingester: fix issue where runtime limits erroneously override default limits. #4246
 * [BUGFIX] Ruler: fix startup in single-binary mode when the new `ruler_storage` is used. #4252
 * [BUGFIX] Querier: fix queries failing with "at least 1 healthy replica required, could only find 0" error right after scaling up store-gateways until they're ACTIVE in the ring. #4263
+* [BUGFIX] Store-gateway: when blocks sharding is enabled, do not load all blocks in each store-gateway in case of a cold startup, but load only blocks owned by the store-gateway replica. #4271
 
 ## Blocksconvert