Index: /trunk/src/VBox/Frontends/VirtualBox/src/monitor/performance/UIPerformanceMonitor.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/monitor/performance/UIPerformanceMonitor.cpp	(revision 85327)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/monitor/performance/UIPerformanceMonitor.cpp	(revision 85328)
@@ -587,8 +587,11 @@
     , m_strUnit(strUnit)
     , m_iMaximum(0)
+#if 0 /* Unused according to Clang 11. */
     , m_iMaximumQueueSize(iMaximumQueueSize) /** @todo r=bird: m_iMaximumQueueSize is not used anywhere that I can see. */
+#endif
     , m_fRequiresGuestAdditions(false)
     , m_fIsInitialized(false)
 {
+    RT_NOREF(iMaximumQueueSize); /* Unused according to Clang 11. */
     m_iTotal[0] = 0;
     m_iTotal[1] = 0;
@@ -597,5 +600,7 @@
 UIMetric::UIMetric()
     : m_iMaximum(0)
+#if 0 /* Unused according to Clang 11. */
     , m_iMaximumQueueSize(0)
+#endif
     , m_fRequiresGuestAdditions(false)
     , m_fIsInitialized(false)
Index: /trunk/src/VBox/Frontends/VirtualBox/src/monitor/performance/UIPerformanceMonitor.h
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/monitor/performance/UIPerformanceMonitor.h	(revision 85327)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/monitor/performance/UIPerformanceMonitor.h	(revision 85328)
@@ -88,5 +88,7 @@
       * we get from IMachineDebugger m_data values are computed as deltas of total values t - (t-1) */
     quint64 m_iTotal[DATA_SERIES_SIZE];
+#if 0 /* Unused according to Clang 11. */
     int m_iMaximumQueueSize;
+#endif
     bool m_fRequiresGuestAdditions;
     /** Used for metrices whose data is computed as total deltas. That is we receieve only total value and