1. A method for managing requests for computing resources, the method comprising: dynamically throttling requests for computing resources generated by one or more tenants within a multi-tenant system, the requests being directed to a computing resource, the requests of a tenant being selectively throttled based upon a comparison of a usage metric and a priority for the tenant; and automatically updating the usage metric for the tenant by continually calculating, for a given time measurement, the usage metric by multiplying an aggregate number of read requests for the tenant over the time measurement by an average read latency relative to the computing resource, plus a product of a number of write requests and the average write latency relative to the computing resource.