1. A computer-implemented method, the method executed by one or more processors, the method comprising: identifying, at a load balancer, a request related to a model-based application executing in a multi-tenant system, wherein the multi-tenant system associated with a plurality of application servers, and wherein the load balancer manages routing of identified requests related to the model-based application to particular application servers in the multi-tenant system; identifying, by the load balancer, at least one object in the model-based application associated with the identified request, wherein identifying the at least one object includes accessing a metadata repository associated with the model-based application to identify one or more design time objects associated with the identified request; accessing, by the load balancer, a multi-tenant cache map storing information defining a current status of local caches of each of the plurality of application servers in the multi-tenant system maintained by the load balancer, wherein the multi-tenant cache map collects local cache information from each of the plurality of application servers in the multi-tenant system and identifies at least the locally-cached runtime versions of objects available in the corresponding local cache of the particular application servers; identifying, by the load balancer using the multi-tenant cache map, at least two application servers from the plurality of application servers based on a determination that each of the at least two application servers includes, at a time the request is identified, a locally-cached version of at least one runtime version of the at least one identified object in the model-based application based on the current status of the local caches of the at least two application server as defined in the multi-tenant cache map; and in response to identifying the at least two application servers, determining, by the load balancer, a particular application server from the at least two application servers to send the identified request for processing based at least in part on a combination of the locally-cached version of the at least one runtime version being available at the particular application server and the relative processing load of the particular application server as compared to the other application servers in the at least two identified application servers; and sending, by the load balancer, the identified request to the determined particular application server for processing.