[wplug] How much performance increase with more memory?

[James O'Kane]

On Tue, 15 Apr 2003, Tim Lesher wrote:

> On Tue, Apr 15, 2003 at 12:52:30PM -0400, John Strange wrote:
> > man vmstat :)
> 
> Yep, or free(1).  As usual in Linux, There's More Than One Way To Do
> It (tm). :-)  I usually gravitate towards /proc/<whatever> just out of
> habit.
> 

or sar(1) from sysstat package. It was added to Red Hat a few versions 
ago, and takes 5 minute samples and keeps them for about a week. Much less 
guesswork when you can see a weeklong trend.

It's on my longterm project list at work to gather such stats so we can 
decide if we have enough compute servers, for example. If I don't find 
something prepackaged, I'll probably use rrdtool to graph the data in 
manager-friendly format.

-james