The /HEAP option sets the size of the heap in bytes. It has the following form:
The reserve argument specifies the total heap allocation in virtual memory. The default heap size is 1MB. The linker rounds up the specified value to the nearest 4 bytes.
The optional commit argument is subject to interpretation by the operating system. It specifies the amount of physical memory to allocate at a time. Committed virtual memory causes space to be reserved in the paging file. A higher commit value saves time when the application needs more heap space but increases the memory requirements and possibly startup time.
Specify the reserve and commit values in decimal or C-language notation.