What Does Windows' "Memory Usage" Actually Mean? — Correctly Reading Working Set, Private Bytes, Commit, and the Page File (archived 2026-08-30)

Abstract

Task Manager's Memory, Working Set, Private Bytes, and Commit are not the same figure. This article explains the relationship between Windows virtual and physical memory, the role of the page file, and which metrics to watch when investigating memory pressure or leaks. Archived version of https://comcomponent.com/en/blog/windows-memory-usage-working-set-commit/, as published on 2026-08-30. The live article is maintained and may change after this date. First published 2026-08-04.