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Managing Virtual Memory
Concepts
The VM in OpenVMS stands for virtual memory. The core concept of mapping virtual addresses to physical memory, once understood, clarifies many OpenVMS features and functions. Physical memory has become less expensive and, hence, more abundant; yet, programs’ demand for memory also increases. Managing virtual memory also entails managing physical memory. Two primary functions, and advantages, of OpenVMS memory management are allowing programs to be larger than the physical memory available (virtual memory mapping) and allowing multiple processes to use the physical memory in turn in a controlled and protected way.
Objectives
  • Explain the concept of virtual memory
  • Describe demand paging, page faults, and swapping
  • Discuss the function of the free and modified lists
  • Use the SHOW MEMORY command to examine memory uses
  • Use the MONITOR utility to view memory information dynamically
Topics
  • Virtual memory concepts
  • Paging and swapping
  • Maintaining free and modified lists
  • Using SHOW MEMORY
  • Using MONITOR SYSTEM and PAGE
 

Course Information

Title: Managing Virtual Memory
  Code: vp200-08
  Hours: 3.0
 

Modules in this Series
OpenVMS System Management I
 
View OpenVMS System Management Context
View Installing and Upgrading OpenVMS
View Shutdown and Startup of OpenVMS
View Managing Licenses and Layered Products
View Managing Users
View Managing Processes
View Managing Volumes
View Managing Virtual Memory
View Managing Queues
 
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