Support is provided for up to 8GB of pageable (general purpose)
memory on the system for UnixWare 7 Release 7.1. General purpose memory can be used,
for example, for running the kernel itself, running user programs, and providing
buffers for devices and filesystems. In previous versions of UnixWare 7, memory
above 4GB could only be used as dedicated memory, for shared memory
used by database programs.
Significant performance and scalability improvements have been made in order to
use any general purpose memory above 4GB more efficiently (for example,
non-caching, per-LWP segmap, and replacement of the page hash table
with per-vnode AVL trees). These performance improvements are not
limited to systems with greater than 4GB memory.