Date: Tue, 29 Apr 1997 00:20:09 -0700 From: David Greenman <dg@root.com> To: Brian Tao <taob@nbc.netcom.ca> Cc: FREEBSD-STABLE <freebsd-stable@freebsd.org> Subject: Re: Memory usage on NFS server Message-ID: <199704290720.AAA11888@implode.root.com> In-Reply-To: Your message of "Tue, 29 Apr 1997 00:54:53 EDT." <Pine.GSO.3.95.970429004554.12135Z-100000@tor-adm1.nbc.netcom.ca>
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> 2.2-970420-RELENG on an NFS server that does only that. The ~20 >processes normally running on the machine add up to less than 10MB, >yes `top' reports that 78MB is "active". I would have though most of >the memory would be allocated as cache (which is only reported at >25MB). Am I interpreting the numbers incorrectly? ... >Mem: 78M Active, 4984K Inact, 17M Wired, 25M Cache, 8343K Buf, 616K Free The numbers lie; don't believe them. :-) It's not as simple as looking at the "cache" number - pages in "active" and "inactive" are also part of the file cache. I know this makes it very difficult to see how much memory is actually available for caching...I have the same problem on wcarchive. We need to provide an additional metric, but I don't know at the moment how to create the desired information (it's difficult and perhaps impossible in the current architecture). -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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