[ES] Increase JVM heap size

elastic/docker-compose.yml

@@ -9,7 +9,7 @@ services:
       - node.name=es01
       - discovery.type=single-node
 #      - bootstrap.memory_lock=true
-      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
+      - "ES_JAVA_OPTS=-Xms2g -Xmx2g"
     ulimits:
       memlock:
         soft: -1