Real Insight on Performance

Julian Elischer julian at
Tue Jul 15 21:17:56 UTC 2008

Rahul wrote:
> Hi all,
> I am looking to install Unix (and/or like) system for server to run
> some highly computational and multi-threaded applications. My
> background being pretty much all Windows, I am a novice to this field.
> I have grasped some basics by reading some material on web and how-to
> books but event after extensive digging around on web for real
> performance numbers on various operating systems, I still haven't
> found anything useful. Most of the data I found were basically
> comparisons of operating systems running MySQL or PostgreSQL to see
> how many connections or simple look up queries they each can server
> per second sort of things. But nothing that would point to underlying
> operations like threading, cache-ing, time slicing, I/O, etc.
> Now, I must admit most of the material showed Linux having upper hand.
> But I am not convinced FreeBSD would be behind in almost all
> performance benchmarks from always hearing the legendary performance
> and stability characteristics of FreeBSD.

most Linux documents will show Linux having hte upper hand of course..
For computational stuff in my experience (Image analysis software
using Feedback networks with a mix of floating and fixed point work)
there was not much to choose between the various OS's because the
limiting factor tends to simply be the hardware calculating throughput.
If you have networking or IO as part of the equation then
of course it's different.

One deal that we can offer you that Linux won't is that if you are 
prepared to work with us, we can help you find any bottlenecks
that are hitting you..
(the advantage of working with a smaller group :-)

> Can you please shed some light on what I really should be looking for
> in FreeBSD to optimize it to it's best performance? Am I expecting
> something that is just purely not BSD's priority or philosophy, per
> se? Is there some material I can look over? (note: I've gone through
> the 7.0 Preview and Tuning documentation on FreeBSD's site already.)

you need to tell us more about your workload.

> Thanks.
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