1. A system coupled to a flash cache, the system comprising: a memory; and a processor coupled to the memory, wherein the processor performs operations, the operations comprising: receiving a request to perform staging or destaging operations with respect to an area of the flash cache, wherein an asynchronous discard scan scans a flash cache directory corresponding to the flash cache to determine tracks to discard from the flash cache, and wherein the staging or destaging operations with respect to the area of the flash cache occurs between the flash cache and disks; determining whether more than a threshold number of asynchronous discard scans are waiting to be performed; and in response to determining that more than the threshold number of asynchronous discard scans are waiting to be performed, avoiding satisfying the request to perform the staging or the destaging operations or a read hit with respect to the area of the flash cache.