Or you can use your handy monitoring system to view this over time: There are three things that may spring to mind when you think of measuring your memory system:įor physical memory usage, you can run top or free from a shell: $ free -g Now I’ll talk about how to monitor virtual memory, on Linux (where it’s easy) and, next time, on Solaris (where most people and systems do it incorrectly.) ![]() Running programs that require more memory than the system has will mean pages (or processes) are moved to/from disk and memory in order to get enough physical memory to run – and system performance will suck.) (TL DR: swapping is moving an entire process out to disk paging is moving just specific pages out to disk, not an entire process. In a prior blog post, I talked about what virtual memory is, the difference between swapping and paging, and why it matters.
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