From: David Schwartz <davids@webmaster.com>
To: <mcmanus@ducksong.com>, <linux-kernel@vger.kernel.org>
Subject: Re: Memory Measurements and Lots of Files and Inodes
Date: Fri, 13 Dec 2002 00:39:27 -0800 [thread overview]
Message-ID: <20021213083926.AAA29353@shell.webmaster.com@whenever> (raw)
In-Reply-To: <20021211235258.GA10857@ducksong.com>
>Can anybody provide a better metric for "ram free for userspace
>allocations"?
This is a constant battle for programmers trying to develop sophisticated
applications for sophisticated operating systems.
If all of the applications are cooperating, you can do it fairly easily.
First, ask the kernel how much physical memory there is. Then fudge a
reduction based on kernel usage. Then subtract the amount of RAM each
application is 'really using' by asking it.
If you write all the applications, this isn't hard to do. If you have to
cooperate with other applications you didn't write, things get trickier. If
you're the only application, things are really easy.
There are any number of heuristics and guesstimates. Ultimately, I recommend
mostly leaving your memory usage user-configurable.
DS
prev parent reply other threads:[~2002-12-13 8:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-11 23:52 Memory Measurements and Lots of Files and Inodes Patrick R. McManus
2002-12-12 0:09 ` Andrew Morton
2002-12-12 0:21 ` Patrick R. McManus
2002-12-12 0:27 ` Andrew Morton
2002-12-13 8:39 ` David Schwartz [this message]
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