Oracle Grid Infrastructure 12c enhances the use of server pools by introducing server attributes e.g. memory, CPU_count etc. which can be associated with each server. Server pools can be configured so that their members belong to a category of servers, which share a particular set of attributes. Moreover, administrators can maintain a library of policies and switch between them as required rather than manually reallocating servers to various server pools based on workload. This paper discusses in detail the new features of policy based cluster management in 12c.