Heterogeneous memory management and services. A memory metadata service obtains memory configuration information that identifies one or more sharable load-store memory segments available on each of a plurality of computing devices. The memory metadata service generates a memory metadata repository that comprises memory metadata that identifies, for each computing device of the plurality of computing devices, the one or more sharable load-store memory segments available on the computing device and, for each sharable load-store memory segment, a memory size of the sharable load-store memory segment and at least one memory attribute. The memory metadata service receives, from a first requesting computing device, a first memory allocation request that requests a first quantity of load-store memory. The memory metadata service sends, to the first requesting computing device, memory allocation information that identifies a first sharable load-store memory segment based on the memory metadata repository.