Not very difficult to set up -- just use a reverse proxy on certain parts of the path (e.g. one set of reverse proxy entries for /api/foo and another for /api/b

Not very difficult to set up -- just use a reverse proxy on certain parts of the path (e.g. one set of reverse proxy entries for /api/foo and another for /api/bar). That way if the foo API gets hammered, the performance of bar is unaffected (assuming your proxy layer is adequately sized). Note this doesn't help if your persistence layer gets overwhelmed (since in a monolith you'll still probably have a single persistence layer). Separating the persistence layer is by far the hardest part of moving from a monolithic to a micro services architecture.