A memory management method implemented by a requesting node includes sending first indication information used for indicating a length of memory required by the requesting node and receiving second indication information used for indicating first remote memory provided to the requesting node by a target contributing node in at least one contributing node that can provide remote memory. The method also includes determining, from available virtual addresses, a first virtual address corresponding to the first remote memory, and sending a first data read/write instruction for the first data when first data whose pointer is within a range of the first virtual address needs to be read/written, where the first data read/write instruction includes third indication information, and the third indication information is used for indicating storage space, for storing the first data, in the first remote memory.