A method for heap space management includes, in response to a determination that consumption of a first heap space of an application exceeds a first threshold, determining whether a second heap space of the application after garbage collection is sufficient to accommodate data stored in the first heap space. The method further includes, in response to a determination that the second heap space after the garbage collection is sufficient to accommodate the data, performing the garbage collection on the second heap space. The method further includes storing the data into the second heap space.