diff --git a/flint-core/src/main/java/org/opensearch/flint/core/metrics/reporter/DimensionedCloudWatchReporter.java b/flint-core/src/main/java/org/opensearch/flint/core/metrics/reporter/DimensionedCloudWatchReporter.java
index 3d1876448..8d2257e28 100644
--- a/flint-core/src/main/java/org/opensearch/flint/core/metrics/reporter/DimensionedCloudWatchReporter.java
+++ b/flint-core/src/main/java/org/opensearch/flint/core/metrics/reporter/DimensionedCloudWatchReporter.java
@@ -372,7 +372,10 @@ public MetricInfo getMetricInfo(DimensionedName dimensionedName) {
         Set<Dimension> dimensions = new HashSet<>();
         if (doesNameConsistsOfMetricNameSpace(parts)) {
             metricName = Stream.of(parts).skip(2).collect(Collectors.joining("."));
-            addInstanceRoleDimension(dimensions, parts);
+            // Exclude instance role for OpenSearch metrics
+            if (!parts[3].equals("opensearch")) {
+                addInstanceRoleDimension(dimensions, parts);
+            }
         }
         addDefaultDimensionsForSparkJobMetrics(dimensions);
         dimensions.addAll(dimensionedName.getDimensions());