diff --git a/pkg/tsdb/cloudwatch/query_transformer.go b/pkg/tsdb/cloudwatch/query_transformer.go
index 8a17f7a73bb..0ce7c1e8be5 100644
--- a/pkg/tsdb/cloudwatch/query_transformer.go
+++ b/pkg/tsdb/cloudwatch/query_transformer.go
@@ -53,7 +53,7 @@ func (e *cloudWatchExecutor) transformRequestQueriesToCloudWatchQueries(requestQ
 	return cloudwatchQueries, nil
 }
 
-func (e *cloudWatchExecutor) transformQueryResponseToQueryResult(cloudwatchResponses []*cloudwatchResponse) map[string]*tsdb.QueryResult {
+func (e *cloudWatchExecutor) transformQueryResponsesToQueryResult(cloudwatchResponses []*cloudwatchResponse) map[string]*tsdb.QueryResult {
 	responsesByRefID := make(map[string][]*cloudwatchResponse)
 	refIDs := sort.StringSlice{}
 	for _, res := range cloudwatchResponses {
diff --git a/pkg/tsdb/cloudwatch/response_parser.go b/pkg/tsdb/cloudwatch/response_parser.go
index c798aeb1752..b353ce97f33 100644
--- a/pkg/tsdb/cloudwatch/response_parser.go
+++ b/pkg/tsdb/cloudwatch/response_parser.go
@@ -46,7 +46,7 @@ func (e *cloudWatchExecutor) parseResponse(metricDataOutputs []*cloudwatch.GetMe
 		}
 	}
 
-	cloudWatchResponses := make([]*cloudwatchResponse, 0)
+	cloudWatchResponses := make([]*cloudwatchResponse, 0, len(mdrs))
 	for id, lr := range mdrs {
 		query := queries[id]
 		frames, partialData, err := parseMetricResults(lr, labels[id], query)
diff --git a/pkg/tsdb/cloudwatch/time_series_query.go b/pkg/tsdb/cloudwatch/time_series_query.go
index 2fd1852bcbd..1385cc90df7 100644
--- a/pkg/tsdb/cloudwatch/time_series_query.go
+++ b/pkg/tsdb/cloudwatch/time_series_query.go
@@ -97,7 +97,7 @@ func (e *cloudWatchExecutor) executeTimeSeriesQuery(ctx context.Context, queryCo
 			}
 
 			cloudwatchResponses = append(cloudwatchResponses, responses...)
-			res := e.transformQueryResponseToQueryResult(cloudwatchResponses)
+			res := e.transformQueryResponsesToQueryResult(cloudwatchResponses)
 			for _, queryRes := range res {
 				resultChan <- queryRes
 			}