Fix cluster level dense vector stats

docs/reference/rest-api/common-parms.asciidoc

@@ -507,6 +507,10 @@ Return all statistics.
 `completion`::
 <<completion-suggester,Completion suggester>> statistics.
 
+`dense_vector`::
+Total number of dense vectors indexed.
+<<indices-refresh,Index refreshes>> can affect this statistic.
+
 `docs`::
 Number of documents, number of deleted docs which have not yet merged out, and total size in bytes.
 <<indices-refresh,Index refreshes>> can affect this statistic.

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/cluster.stats/10_basic.yml

@@ -258,14 +258,12 @@
 ---
 "Dense vector stats":
   - requires:
-      cluster_features: [ "gte_v8.10.0" ]
-      reason: "dense vector stats added in 8.10"
+      cluster_features: [ "gte_v8.15.0" ]
+      reason: "dense vector stats reports from primary indices in 8.15"
   - do:
       indices.create:
         index: test1
         body:
-          settings:
-            number_of_replicas: 0
           mappings:
             properties:
               vector:
@@ -283,8 +281,6 @@
       indices.create:
         index: test2
         body:
-          settings:
-            number_of_replicas: 0
           mappings:
             properties:
               vector:

server/src/main/java/org/elasticsearch/action/admin/cluster/stats/ClusterStatsIndices.java

@@ -74,14 +74,14 @@ public ClusterStatsIndices(
                 if (shardStats.getShardRouting().primary()) {
                     indexShardStats.primaries++;
                     docs.add(shardCommonStats.getDocs());
+                    denseVectorStats.add(shardCommonStats.getDenseVectorStats());
                     sparseVectorStats.add(shardCommonStats.getSparseVectorStats());
                 }
                 store.add(shardCommonStats.getStore());
                 fieldData.add(shardCommonStats.getFieldData());
                 queryCache.add(shardCommonStats.getQueryCache());
                 completion.add(shardCommonStats.getCompletion());
                 segments.add(shardCommonStats.getSegments());
-                denseVectorStats.add(shardCommonStats.getDenseVectorStats());
             }
 
             searchUsageStats.add(r.searchUsageStats());

server/src/main/java/org/elasticsearch/rest/action/cat/RestShardsAction.java

@@ -254,7 +254,7 @@ protected Table getTableWithHeader(final RestRequest request) {
         );
         table.addCell(
             "dense_vector.value_count",
-            "alias:dvc,denseVectorCount;default:false;text-align:right;desc:total count of indexed dense vector"
+            "alias:dvc,denseVectorCount;default:false;text-align:right;desc:number of indexed dense vectors in shard"
         );
         table.addCell(
             "sparse_vector.value_count",