Keycloak should not consume 20GB memory

templates/keycloak.service.j2

@@ -8,7 +8,7 @@ Environment=LAUNCH_JBOSS_IN_BACKGROUND=1
 Environment=JBOSS_PIDFILE=/var/run/keycloak/keycloak.pid
 Environment=JBOSS_HOME={{ keycloak_jboss_home }}
 Environment=JBOSS_LOG_DIR={{ keycloak_log_dir }}
-Environment="JAVA_OPTS=-Xms1024m -Xmx20480m"
+Environment="JAVA_OPTS=-Xms1024m -Xmx1536m"
 User=keycloak
 Group=keycloak
 LimitNOFILE=102642