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From "Caldarale, Charles R" <Chuck.Caldar...@unisys.com>
Subject RE: Capacity Planning Turk's Formula
Date Thu, 17 Jan 2013 22:55:45 GMT
> From: yogesh hingmire [mailto:yogesh.hingmire@gmail.com] 
> Subject: Re: Capacity Planning Turk's Formula

> How do you think capacity planning should be approached ?

The _only_ way is to actually benchmark your application(s).  Tomcat itself adds very little
overhead, so it really depends on the characteristics of the webapps.  This is frequently
non-trivial (e.g., involving data base accesses over a network connection, static file retrieval,
etc.), so the estimation has to be based on the application architecture - and only you know
that.  Hardware resources are exceptionally inexpensive these days, so it's rare for throughput
or response time to be limited by the server speed and capacity; instead, it's usually synchronization
points in the webapps that limit performance.

 - Chuck

PS.  Note that a few things in Mladen's article are a bit out of date, such as one Tomcat
thread being dedicated to each connection.


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