Add new CachePopulationReason (elastic#130593)

fcofdez · mridula-s109 · commit 4e5fd77b4c26 · 2025-07-17T17:53:36.000+01:00
diff --git a/docs/changelog/130593.yaml b/docs/changelog/130593.yaml
@@ -0,0 +1,5 @@
+pr: 130593
+summary: Add new `CachePopulationReason`
+area: Store
+type: enhancement
+issues: []
diff --git a/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/BlobCacheMetrics.java b/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/BlobCacheMetrics.java
@@ -47,7 +47,11 @@ public enum CachePopulationReason {
         /**
          * When the data we need is not in the cache
          */
-        CacheMiss
+        CacheMiss,
+        /**
+         * When data is prefetched upon new commit notifications
+         */
+        PreFetchingNewCommit
     }
 
     public BlobCacheMetrics(MeterRegistry meterRegistry) {
