diff --git a/internal/metrics/mapping.go b/internal/metrics/mapping.go
index 742194f..4f54a48 100644
--- a/internal/metrics/mapping.go
+++ b/internal/metrics/mapping.go
@@ -32,7 +32,7 @@ func generateMetricNamesMap() map[string]metricLookup {
 		"CPU/SystemSummary/System CPU time percentage":                            metricLookup{"system_cpu_time_percentage", true},
 		"CPU/SystemSummary/User CPU time percentage":                              metricLookup{"user_cpu_time_percentage", true},
 		"CPU/SystemSummary/RAM free percentage":                                   metricLookup{"ram_free_percentage", true},
-		"CPU/SystemSummary/RAM total bytes":                                       metricLookup{"system_ram_size_bytes", true},
+		"CPU/SystemSummary/RAM total bytes":                                       metricLookup{"system_ram_size_bytes", false},
 		"CPU/QMgrSummary/System CPU time - percentage estimate for queue manager": metricLookup{"system_cpu_time_estimate_for_queue_manager_percentage", true},
 		"CPU/QMgrSummary/User CPU time - percentage estimate for queue manager":   metricLookup{"user_cpu_time_estimate_for_queue_manager_percentage", true},
 		"CPU/QMgrSummary/RAM total bytes - estimate for queue manager":            metricLookup{"ram_usage_estimate_for_queue_manager_bytes", true},
diff --git a/test/docker/mqmetric_test_util.go b/test/docker/mqmetric_test_util.go
index 2f52131..013269f 100644
--- a/test/docker/mqmetric_test_util.go
+++ b/test/docker/mqmetric_test_util.go
@@ -170,7 +170,7 @@ func metricNames() []string {
 		"system_cpu_time_percentage",
 		"user_cpu_time_percentage",
 		"ram_free_percentage",
-		"system_ram_size_bytes",
+		// disabled : "system_ram_size_bytes",
 		"system_cpu_time_estimate_for_queue_manager_percentage",
 		"user_cpu_time_estimate_for_queue_manager_percentage",
 		"ram_usage_estimate_for_queue_manager_bytes",