diff --git a/internal/querynode/metrics_info.go b/internal/querynode/metrics_info.go
index a3a72a09e7..b793e171c7 100644
--- a/internal/querynode/metrics_info.go
+++ b/internal/querynode/metrics_info.go
@@ -35,8 +35,8 @@ func getSystemInfoMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest,
 				IP:           node.session.Address,
 				CPUCoreCount: metricsinfo.GetCPUCoreCount(false),
 				CPUCoreUsage: metricsinfo.GetCPUUsage(),
-				Memory:       uint64(getUsedMemory(node.historical.replica, node.streaming.replica)),
-				MemoryUsage:  uint64(getTotalMemory()),
+				Memory:       uint64(getTotalMemory()),
+				MemoryUsage:  uint64(getUsedMemory(node.historical.replica, node.streaming.replica)),
 				Disk:         metricsinfo.GetDiskCount(),
 				DiskUsage:    metricsinfo.GetDiskUsage(),
 			},