HP-UX 11i Version 1 Installation and Update Guide, December 2003

Controlling Memory Utilization of VxFS 3.5 on HP-UX 11i v1
Conclusion
Appendix E 227
Conclusion
VxFS uses in-memory caches for objects that results in improved file
system performance. The cache sizes are controlled by tunables that are
auto-tuned at boot time by the driver. For situations where the
auto-tuned values are not optimal, users are provided with the ability to
set these tunables.