Not logged in
Log in now
Create an account
Subscribe to LWN
LWN.net Weekly Edition for May 23, 2013
An "enum" for Python 3
An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
To be fair, there isn't really a way to figure out much about memory use from the output of top or htop; they give too confusing a picture.
Posted Jun 13, 2006 5:18 UTC (Tue) by jzbiciak (✭ supporter ✭, #5246)
Most of it does go to disk buffers and shared pages. My own motto is unused memory is wasted memory. The real performance analysis comes from looking at things like vmstat, and whether you have lots of swap or paging traffic.
Available = "Free" (unused) + Cached
Posted Jun 13, 2006 6:30 UTC (Tue) by AnswerGuy (guest, #1256)
Yes, it's an simplication; but it's a useful one.
Then I teach them to watch the si and so (swap in and swap out) columns under vmstat for at least a couple minutes of sustained three digit values before declaring their system to be "out of memory."
Posted Jun 13, 2006 6:57 UTC (Tue) by jwb (guest, #15467)
Posted Jun 13, 2006 19:05 UTC (Tue) by oak (subscriber, #2786)
Posted Jun 15, 2006 19:59 UTC (Thu) by landley (guest, #6789)
Copyright © 2013, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds