Define Cardinal graph candidate limit metric

jamesgao-jpg · jamesgao-jpg · commit 11332bbf2f3e · 2026-06-29T14:15:42.000+08:00
Signed-off-by: jamesgao-jpg &lt;james.gao@zilliz.com&gt;
diff --git a/include/knowhere/prometheus_client.h b/include/knowhere/prometheus_client.h
@@ -159,6 +159,7 @@ KNOWHERE_DECLARE_PROMETHEUS_HISTOGRAM(search_emb_list_retrieval_ann_ratio, PROME
 KNOWHERE_DECLARE_PROMETHEUS_HISTOGRAM(search_emb_list_retrieval_ann_ratio, PROMETHEUS_LABEL_CARDINAL);
 
 KNOWHERE_DECLARE_PROMETHEUS_HISTOGRAM(search_level, PROMETHEUS_LABEL_CARDINAL);
+KNOWHERE_DECLARE_PROMETHEUS_HISTOGRAM(graph_search_candidate_limit, PROMETHEUS_LABEL_CARDINAL);
 KNOWHERE_DECLARE_PROMETHEUS_HISTOGRAM(bitset_ratio, PROMETHEUS_LABEL_CARDINAL);
 KNOWHERE_DECLARE_PROMETHEUS_HISTOGRAM(quant_compute_cnt, PROMETHEUS_LABEL_CARDINAL);
 KNOWHERE_DECLARE_PROMETHEUS_HISTOGRAM(raw_compute_cnt, PROMETHEUS_LABEL_CARDINAL);
diff --git a/src/common/prometheus_client.cc b/src/common/prometheus_client.cc
@@ -155,6 +155,9 @@ KNOWHERE_DEFINE_PROMETHEUS_HISTOGRAM(search_emb_list_retrieval_ann_ratio, PROMET
 KNOWHERE_DEFINE_PROMETHEUS_HISTOGRAM_FAMILY(search_level, "search level")
 KNOWHERE_DEFINE_PROMETHEUS_HISTOGRAM(search_level, PROMETHEUS_LABEL_CARDINAL)
 
+KNOWHERE_DEFINE_PROMETHEUS_HISTOGRAM_FAMILY(graph_search_candidate_limit, "graph search candidate limit")
+KNOWHERE_DEFINE_PROMETHEUS_HISTOGRAM(graph_search_candidate_limit, PROMETHEUS_LABEL_CARDINAL)
+
 KNOWHERE_DEFINE_PROMETHEUS_HISTOGRAM_FAMILY(bitset_ratio, "bitset ratio")
 KNOWHERE_DEFINE_PROMETHEUS_HISTOGRAM_WITH_BUCKETS(bitset_ratio, PROMETHEUS_LABEL_CARDINAL, ratioBuckets)
 
