Issue I518 [programming,81,enhancement] Access memory dump (simion.debug.memory_dump) As of 8.1 early access mode (Issue I421), under 8.0.5-TEST28, a dump of memory usage can be displayed. Enter these two lines into the bottom SIMION command bar: print(simion.debug.memory_dump) It will display something like this in the Log: -- Note: Values are in megabytes. "all" is all virtual memory (physical -- RAM + on-disk page-file) on this system. "physical" is only physical RAM -- memory on this system. "virtual" is virtual address space in THIS -- PROCESS. "virtual reserved" is a contiguous (unfragmented) block of the -- virtual address space specially reserved via the --reserved-memory -- command-line option for large objects. Memory blocks used by or reserved -- for large objects are listed. For optimal performance, don't exhaust -- physical RAM. Per-process address space may be smaller than system memory -- and vice-versa. memory_dump = { all_size = 4961.57, all_free = 3661.70, physical_size = 3071.00, physical_free = 2110.12, virtual_size = 2047.88, virtual_free = 168.59, virtual_reserved_size = 1843.20, virtual_reserved_free = 1366.36, blocks = { {first=14.31, last=395.79, size=381.47, state="used"}, {first=395.79, last=491.16, size=95.37, state="used"}, {first=491.16, last=1857.52, size=1366.36, state="reserved"}, }, blocks_used = 476.84 } You can use this to understand SIMION memory usage, particularly for large objects (potential arrays). Implemented in 8.1 early access (8.0.5-TEST28).