Let store-gateways ignore blocks that are too young.

docs/blocks-storage/querier.md

@@ -733,7 +733,9 @@ blocks_storage:
 
     # Blocks with minimum time within this duration are ignored, and not loaded
     # by store-gateway. Useful when used together with
-    # -querier.query-store-after to prevent loading young blocks.
+    # -querier.query-store-after to prevent loading young blocks, because there
+    # is usually many of them (depending on number of ingesters) and they are
+    # not yet compacted.
     # CLI flag: -blocks-storage.bucket-store.ignore-blocks-within
     [ignore_blocks_within: <duration> | default = 0s]
 

docs/blocks-storage/store-gateway.md

@@ -786,7 +786,9 @@ blocks_storage:
 
     # Blocks with minimum time within this duration are ignored, and not loaded
     # by store-gateway. Useful when used together with
-    # -querier.query-store-after to prevent loading young blocks.
+    # -querier.query-store-after to prevent loading young blocks, because there
+    # is usually many of them (depending on number of ingesters) and they are
+    # not yet compacted.
     # CLI flag: -blocks-storage.bucket-store.ignore-blocks-within
     [ignore_blocks_within: <duration> | default = 0s]
 

docs/configuration/config-file-reference.md

@@ -4987,7 +4987,8 @@ bucket_store:
 
   # Blocks with minimum time within this duration are ignored, and not loaded by
   # store-gateway. Useful when used together with -querier.query-store-after to
-  # prevent loading young blocks.
+  # prevent loading young blocks, because there is usually many of them
+  # (depending on number of ingesters) and they are not yet compacted.
   # CLI flag: -blocks-storage.bucket-store.ignore-blocks-within
   [ignore_blocks_within: <duration> | default = 0s]
 

pkg/storage/tsdb/config.go

@@ -306,7 +306,7 @@ func (cfg *BucketStoreConfig) RegisterFlags(f *flag.FlagSet) {
 	f.DurationVar(&cfg.IgnoreDeletionMarksDelay, "blocks-storage.bucket-store.ignore-deletion-marks-delay", time.Hour*6, "Duration after which the blocks marked for deletion will be filtered out while fetching blocks. "+
 		"The idea of ignore-deletion-marks-delay is to ignore blocks that are marked for deletion with some delay. This ensures store can still serve blocks that are meant to be deleted but do not have a replacement yet. "+
 		"Default is 6h, half of the default value for -compactor.deletion-delay.")
-	f.DurationVar(&cfg.IgnoreBlocksWithin, "blocks-storage.bucket-store.ignore-blocks-within", 0, "Blocks with minimum time within this duration are ignored, and not loaded by store-gateway. Useful when used together with -querier.query-store-after to prevent loading young blocks.")
+	f.DurationVar(&cfg.IgnoreBlocksWithin, "blocks-storage.bucket-store.ignore-blocks-within", 0, "Blocks with minimum time within this duration are ignored, and not loaded by store-gateway. Useful when used together with -querier.query-store-after to prevent loading young blocks, because there is usually many of them (depending on number of ingesters) and they are not yet compacted.")
 	f.IntVar(&cfg.PostingOffsetsInMemSampling, "blocks-storage.bucket-store.posting-offsets-in-mem-sampling", DefaultPostingOffsetInMemorySampling, "Controls what is the ratio of postings offsets that the store will hold in memory.")
 	f.BoolVar(&cfg.IndexHeaderLazyLoadingEnabled, "blocks-storage.bucket-store.index-header-lazy-loading-enabled", false, "If enabled, store-gateway will lazy load an index-header only once required by a query.")
 	f.DurationVar(&cfg.IndexHeaderLazyLoadingIdleTimeout, "blocks-storage.bucket-store.index-header-lazy-loading-idle-timeout", 20*time.Minute, "If index-header lazy loading is enabled and this setting is > 0, the store-gateway will offload unused index-headers after 'idle timeout' inactivity.")