# About memory

Measuring memory usage in a multi-process browser

## Summary

Summary of memory used by currently active browsers. For browsers which use multiple processes, memory reflects aggregate memory used across all browser processes.

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

Memory

Memory

Private: Resident memory size that is not shared with any other process. This is the best indicator of browser memory resource usage.

Proportional: Accounts for each page of memory as a fraction based on the number of processes that have it mapped. Thus, for each page of memory mapped by two processes, this sum will count half of the bytes towards each. Therefore, this number is greater than the private count.

(Note that the memory for this tab is not included in the browser totals)

Browser | Private | Proportional
| k | k

Note: If other browsers (e.g. IE, Firefox, Safari) are running, I'll show their memory details here.

## Processes

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

|  | Memory
--- | --- | ---
PID | Name | Private | Proportional
| Browser | k | k
|  | k | k
| Σ | 0 k |
No results found.

(The memory usage of our renderer processes is slightly less accurate when they are sandboxed.)