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albertyw.com · May 26, 2026

Interpreting Linux Memory Metrics

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note Linux memory accounting is full of metrics that look similar but measure very different things. This post is a short tour of the most useful ones and where they come from. How Linux Models Memory Linux gives every process a private virtual address space. Pages in that space may or may not be backed by physical RAM at any given moment - the kernel pages them in on demand and evicts them under…

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