Estimate Virtual Memory Needs

This appendix helps you to estimate the virtual memory requirements for the Performance Manager when performing the following tasks:

Generating Reports and Graphs using the DCL user interface
Selecting daily or history data using the Command Mode interface
Selecting daily or history data using the DECwindows interface

The virtual address space that a process may use is governed by smallest of either the process quota PGFLQUOTA, or the SYSGEN Parameter VIRTUALPAGECNT. Since an image is generally forced to exit when its virtual address space is exhausted, it is best to plan to have a sufficient amount for the desired task.

This section contains the following topics:

How Performance Manager Uses Virtual Memory

For Graphs

For Reports

For Integrity Servers and Alpha Systems