Specify the amount of memory to allocate to dormant programs in the run-time system. A dormant program is one which has been
logically cancelled by the run unit, but has not been physically unloaded from memory. A dormant program can be executed considerably
faster than one which has to be loaded from disk, so this memory allocation is effectively a cache of programs that have been
cancelled but might be needed again.
When the size you specify is reached, all cancelled programs are unloaded, thereby releasing all of the dynamically allocated
memory. If you specify a size of 0, all cancels will physically unload the program from memory.