By Mark Russinovich
Published: October 15, 2020
Have you ever wondered exactly how Windows is assigning physical memory, how much file data is cached in RAM, or how much RAM is used by the kernel and device drivers? RAMMap makes answering those questions easy. RAMMap is an advanced physical memory usage analysis utility for Windows Vista and higher. It presents usage information in different ways on its several different tabs:
- Use Counts: usage summary by type and paging list
- Processes: process working set sizes
- Priority Summary: prioritized standby list sizes
- Physical Pages: per-page use for all physical memory
- Physical Ranges: physical memory addresses
- File Summary: file data in RAM by file
- File Details: individual physical pages by file
Use RAMMap to gain understanding of the way Windows manages memory, to analyze application memory usage, or to answer specific questions about how RAM is being allocated. RAMMap’s refresh feature enables you to update the display and it includes support for saving and loading memory snapshots.
For definitions of the labels RAMMap uses as well as to learn about the physical-memory allocation algorithms used by the Windows memory manager, please see Windows Internals, 5^th^ Edition.
- Windows Internals Book The official updates and errata page for the definitive book on Windows internals, by Mark Russinovich and David Solomon.
- Windows Sysinternals Administrator's ReferenceThe official guide to the Sysinternals utilities by Mark Russinovich and Aaron Margosis, including descriptions of all the tools, their features, how to use them for troubleshooting, and example real-world cases of their use.
Download RAMMap (488 KB)
Run now from Sysinternals Live.
- Client: Windows Vista and higher.
- Server: Windows Server 2008 and higher.
- Defrag Tools: #6 - RAMMap
In this episode of Defrag Tools, Andrew Richards and Larry Larsen cover using RAMMap to see how RAM is being used and tell if there has been any memory pressure.