25.2 Heap size

25.2 Heap size

In principle 64-bit LispWorks can grow to almost 16TB but it is intentionally limited to a defined range in order to avoid clashes with other software as shown in Default range for 64-bit LispWorks heap.

Default range for 64-bit LispWorks heap
Platform	Default range	Notes
Intel-based Macintosh	`#x4000000000` to `#x40000000000` (3.75TB)
PowerPC Macintosh	`#x4000000000` to `#x40000000000` (3.75TB)
Linux	`#x4000000000` to `#x7000000000` (192GB)	Effective limit around 160GB.
Windows	`#x4000000000` to `#x40000000000` (3.75TB)
Solaris	`#x4000000000` to `#x10000000000` (768GB)

64-bit LispWorks is relocatable on all supported platforms as described in Startup relocation of 64-bit LispWorks.

In contrast, 32-bit LispWorks has a maximum heap size of 1.5-3.0GB depending on platform and is relocatable on non-Windows platforms only, as described in Startup relocation of 32-bit LispWorks.

LispWorks User Guide - 11 Mar 2008