# About memory

Measuring memory usage in a multi-process browser

## Summary

Summary of memory used by currently active browsers.

For Chromium, processes used to to display diagnostics information (such as this "about:memory") are excluded.

| Memory Memory Resident: Amount of memory that is present in physical RAM. This is the best indicator of browser memory resource usage. Shared: Amount of memory that is present in physical RAM and can be shared with another process. Private: Amount of memory that is present in physical RAM and can not be shared with another process. Virtual: Amount of address space allocated in virtual memory. (Note that the memory for this tab is not included in the browser totals.)
--- | ---
Browser | Resident | Shared | Private | Virtual
| k | k | k | k

Note: This page will show memory use for all running browsers, not just Chrome.
Note: Chrome includes memory used by plug-ins, other browsers may not.
(Bug: We seriously overcount our own memory usage: Issue 25454.)

## Processes

Details of memory usage for each of Chromium's processes.

|  | Memory
--- | --- | ---
PID | Name | Resident | Shared | Private | Virtual
| Browser | k | k | k | k
|  | k | k | k | k
No results found.

(Note: Due to memory sharing between processes, summing memory usage does not give total memory usage.)