diff --git a/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml b/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml
index 63c1443..83a5a6e 100644
--- a/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml
+++ b/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml
@@ -66,6 +66,10 @@
     prometheus_influxdb_db: lma
     prometheus_influxdb_username: lma
     prometheus_influxdb_password: ${_param:influxdb_stacklight_password}
+  elasticsearch:
+    server:
+      heap:
+        size: 1
   keepalived:
     cluster:
       instance: