diff --git a/charts/generic/node-memory-hog/experiment.yaml b/charts/generic/node-memory-hog/experiment.yaml
index 829eb6e..47d520d 100644
--- a/charts/generic/node-memory-hog/experiment.yaml
+++ b/charts/generic/node-memory-hog/experiment.yaml
@@ -51,6 +51,11 @@ spec:
     - name: TOTAL_CHAOS_DURATION
       value: '60'
 
+    ## specify the size as percent of total available memory (in percentage %)
+    ## Default value "90%"
+    - name: MEMORY_PERCENTAGE
+      value: '90'        
+
     # Period to wait before injection of chaos in sec
     - name: RAMP_TIME
       value: ''