Similarly, running additional instances of an app can allow an app to handle increases in user load and concurrent requests. These adjustments are called scaling. Scaling your app horizontally adds or removes app instances. Adding more instances allows your application to handle increased traffic and demand.
Scaling your app vertically changes the disk space limit or memory limit for each app instance
Increase the memory limit for each app instance:
cf scale cf-spring -m 1G
Increase the disk limit for each app instance:
cf scale cf-spring -k 512M