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From: "Bill Barker" <wbarker@wilshire.com>
To: "Tomcat Developers List" <tomcat-dev@jakarta.apache.org>
References: <429E5DD3.5000401@joedog.org> <429EA18E.4070309@apache.org>
 <429EE245.4050502@joedog.org>
Subject: Re: Initial apr results
Date: Thu, 2 Jun 2005 07:29:17 -0700
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You might also want to dig up Peter's JMeter test plan.  This one is the 
opposite of the 'ab' test, in that it tests the ability to handle a lot of 
socket connections without necessarily much throughput.

As Remy said, the 'ab -k' tests should be close unless either your JVM 
vendor or your APR implementation s*cks.  Both connectors do much the same 
thing with this test execpt for sendfile (and 'tomcat.gif' is too small to 
for Tomcat to use sendfile by default).

----- Original Message ----- 
From: "Tim Funk" <funkman@joedog.org>
To: "Tomcat Developers List" <tomcat-dev@jakarta.apache.org>
Sent: Thursday, June 02, 2005 3:41 AM
Subject: Re: Initial apr results


> Excellent. In my future tests, I'll keep the concurrency lower and the 
> hits higher. I'll also use different size files. I am only able to use a 
> 1.4.2 JVM. I might be able to get 1.5 on - but its highly doubtful.
>
> -Tim
>
> Remy Maucherat wrote:
>> Tim Funk wrote:
>>
>>> My test box was an HP-UX 9000/800/L1000-44 - Dual CPU (440 MHz)
>>>
>>> On my initial tests with the APR connector - the APR connector "seemed" 
>>> slower the "old" http connector. But the difference is mild and my 
>>> initial numbers are flaky. On the same hardware - I am running 6 other 
>>> instances (of different versions) of tomcat at the same time which may 
>>> be throwing my numbers off.
>>>
>>> During some slow time - I might be able to take most of them down and 
>>> run some more tests to try to ensure I am hogging all the resources to 
>>> the box and not sharing them.
>>>
>>> For those curious - for /tomcat.gif - my requests per second range 
>>> anywhere from 1200+ to 5000+ - Due to such a large range - I have no 
>>> confidence in my numbers so far to reach any conclusion.
>>>
>>> I was using the command:
>>>  /usr/local/httpd/bin/ab -n 1000 -c 100 -k 
>>> http://myserver:8090/tomcat.gif
>>>
>>> With keepalive off - I was still easily over 1000 requests per second 
>>> for tomcat.gif.
>>
>>
>> I can't assert yet that there are no bugs at the moment (performance or 
>> otherwise). So far, performance seems good on Windows, and Linux. To give 
>> a comparison on Windows with this test, APR HTTP is within 5% of regular 
>> HTTP, and gets closer depending on the JVM (I suppose if it's better at 
>> JNI - I've noticed slightly better results with Sun JDK 1.5 Server 
>> compared to 1.4.2 client).
>>
>> I think you should use -n 20000 at least: if the test duration is too 
>> small, ab is going to produce random results. In this test, increasing 
>> concurrency isn't particularly useful either.
>>
>> Obviously, the results of this kind of testing are not really important 
>> as long as the results stay relatively close (for example, I think 
>> the -25% result I got when using polling exclusively was really good).
>>
>
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