Liangxu Linux

Mar 6, 2024 · Fundamentals

Why Page Cache Isn’t Freed After a Container Restart – A Deep Dive into Linux Memory Stats

This article explains how Linux reports memory usage, clarifies the meaning of free, buffers, cache, and available fields, details /proc/meminfo entries, distinguishes page‑cache, buffer‑pages, shared memory, and shows how process‑level tools like smaps and top present memory statistics.