8.1. Virtual Address Space

While the amount of physical memory available for HP-UX is determined by the number of memory chips installed on the computer, the system can make a much larger amount of space available to each process through the use of virtual memory. Virtual addressing is used to access the virtual memory on the system. In order to understand the major bottlenecks that affect memory, it is necessary to know how virtual addressing works on Precision Architecture and IPF machines. Section 6.1.3, “Virtual Memory” on page 108 describes the virtual addressing mechanism at the hardware level in some detail for PA-RISC and IPF. This section will describe how HP-UX uses the hardware virtual addressing features to provide a virtual address ...

Get HP-UX 11i Tuning and Performance now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.