diff --git a/internal/core/src/exec/operator/FilterBitsNode.cpp b/internal/core/src/exec/operator/FilterBitsNode.cpp
index 3bf6d0396811b..72148e347c69e 100644
--- a/internal/core/src/exec/operator/FilterBitsNode.cpp
+++ b/internal/core/src/exec/operator/FilterBitsNode.cpp
@@ -107,7 +107,7 @@ PhyFilterBitsNode::GetOutput() {
     double scalar_cost =
         std::chrono::duration<double, std::micro>(scalar_end - scalar_start)
             .count();
-    monitor::internal_core_search_latency_scalar.Observe(scalar_cost);
+    monitor::internal_core_search_latency_scalar.Observe(scalar_cost / 1000);
 
     return std::make_shared<RowVector>(col_res);
 }
diff --git a/internal/core/src/exec/operator/GroupByNode.cpp b/internal/core/src/exec/operator/GroupByNode.cpp
index c461d54bf69c0..bd13eab202096 100644
--- a/internal/core/src/exec/operator/GroupByNode.cpp
+++ b/internal/core/src/exec/operator/GroupByNode.cpp
@@ -81,7 +81,7 @@ PhyGroupByNode::GetOutput() {
     double vector_cost =
         std::chrono::duration<double, std::micro>(vector_end - vector_start)
             .count();
-    monitor::internal_core_search_latency_groupby.Observe(vector_cost);
+    monitor::internal_core_search_latency_groupby.Observe(vector_cost / 1000);
     return input_;
 }
 
diff --git a/internal/core/src/exec/operator/VectorSearchNode.cpp b/internal/core/src/exec/operator/VectorSearchNode.cpp
index 57aa0999c021f..df7a550f6cd86 100644
--- a/internal/core/src/exec/operator/VectorSearchNode.cpp
+++ b/internal/core/src/exec/operator/VectorSearchNode.cpp
@@ -93,7 +93,7 @@ PhyVectorSearchNode::GetOutput() {
     double vector_cost =
         std::chrono::duration<double, std::micro>(vector_end - vector_start)
             .count();
-    monitor::internal_core_search_latency_vector.Observe(vector_cost);
+    monitor::internal_core_search_latency_vector.Observe(vector_cost / 1000);
     // for now, vector search store result in query_context
     // this node interface just return bitset
     return input_;