Re: Production server tuning

[Antonio Fiol Bonnín]

john d. haro wrote:

What is the load on your web servers?

Very low.

Could you repurpose a web server and
load balance the app server instead?

Web servers are light machines (uniprocessor, low memory, ...), while app server is a heavyweight (two nice fast processors, 4Gb RAM, ...). Web servers are Linux Intel, App server is Solaris/Sparc.

Sadly I don’t know anything about load balancing Tomcat and I'm usually
doing BEA WL or WAS setups.  I'm here to learn people... don’t flame me.

No flames. Thank you for your .02

[...] don’t you
performance test before going 'live'?

We went live even before we were sure that everything was functionally correct. We have been very lucky it has. Now we're live-optimizing ;-(

 That is how we 'tune' our systems...
run some serious load tests on your setup in a mirrored QA or staging
environment prior to go-live.  Then watch closely, use a code profiler or
similar tools to see where the bottlenecks are.  Play with the database and
app server configurations...

We will try to do that before our next update.

Sometimes turning up things like connections will actually seriously degrade
performance for a myriad of other reasons.

Could you please elaborate a bit more on that?

Apache JMeter running on several machines is a good load tester.

Why did you say "several machines"? Do you mean JMeter may be the bottleneck if run single-instance?

 If you
have the $$ and the project is important enough... we have had great results
from the Compuware suite of products, TrueTime etc.

I don't think so.

Good luck

Thank you.


Antonio Fiol

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