diff --git a/start-high-RAM.sh b/start-high-RAM.sh
index ddde853..82aaf17 100644
--- a/start-high-RAM.sh
+++ b/start-high-RAM.sh
@@ -34,7 +34,7 @@ fi
 # Comment out for bigger systems, e.g. non-routers
 # or when API documentation is enabled
 # Uncomment (remove '#' sign) line below if your system has less than 12GB of RAM for optimal RAM defaults
-JVM_MEMORY_ARGS="-Xss1024k -Xmx8128m"
+JVM_MEMORY_ARGS="-Xss1024m -Xmx8128m -XX:MaxRAM=8172m -XX:+UseSerialGC"
 
 # Although java.net.preferIPv4Stack is supposed to be false
 # by default in Java 11, on some platforms (e.g. FreeBSD 12),