From 1371db5a4f407b33a573b94f0759cadc8f98b289 Mon Sep 17 00:00:00 2001
From: Arne Juul <arnej@vespa.ai>
Date: Fri, 3 Jan 2025 20:17:57 +0000
Subject: [PATCH] add some global-phase tracing

---
 .../main/java/com/yahoo/prelude/cluster/ClusterSearcher.java   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/container-search/src/main/java/com/yahoo/prelude/cluster/ClusterSearcher.java b/container-search/src/main/java/com/yahoo/prelude/cluster/ClusterSearcher.java
index 4ea9facc138e..593c0aa80c79 100644
--- a/container-search/src/main/java/com/yahoo/prelude/cluster/ClusterSearcher.java
+++ b/container-search/src/main/java/com/yahoo/prelude/cluster/ClusterSearcher.java
@@ -240,6 +240,9 @@ private Result perSchemaSearch(String schema, Query query) {
         }
         Result result = schema2Searcher.get(schema).search(schema, query);
         if (useGlobalPhase) {
+            if (query.getTrace().isTraceable(3)) {
+                query.trace("Use global-phase from [" + schema + "] to re-rank " + rerankCount + " hits", 3);
+            }
             globalPhaseRanker.rerankHits(query, result, schema);
             result.hits().trim(wantOffset, wantHits);
             query.setOffset(wantOffset);