Perfomance analysis

[Michael Oullion]

hello,

 

I'm doing some benchmark on Web service's Call and I have some strange results.

 

First of all,

My web service is on a Axis2 1.5.1  framework,

I use a Apache Tomcat 6.0.20 / JRE (server mode) 1.6.0_20-b02.

I use JMeter 2.3.4 to do my benchmark.

 

When I analyze my result, I have some nice (and stable ) things but some times 
I observe a huge decrease of Hit/second and a huge increase of response time.

For example, normal response time is (avg) 300 ms and it increase to 1.000 ms 
and more, at the same time the hit/second decrease from 90 to 40.

 

I watch the CPU activity to see if the bottleneck is here and I observe that I 
have the same thing.

When the response time increase, the CPU activity fall down from 40% to 10%. 

I watch disk time access too and I don't observe a link between this activity 
and the fall of performance.

 

I try to attach my graph to this mail but I don't know if it's okay on the 
mailing list.

I don't understand why some time the performance fall down.

So, if you are some ideas...
  
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RE: Perfomance analysis

[Michael Oullion]

Oh sorry, I forgot to explain my architecture.

No, I have one dedicated server which host the tomcat and I use JMeter on a 
second server ( not dedicated ).
 
 From: andrew.br...@gmail.com
 To: users@tomcat.apache.org
 Subject: Re: Perfomance analysis
 Date: Tue, 15 Jun 2010 19:53:56 +1000
 CC: users@tomcat.apache.org
 
 Is jmeter on same box as app?
 
 On 15/06/2010, at 7:05 PM, Michael Oullion theaz...@hotmail.com wrote:
 
  hello,
 
  I'm doing some benchmark on Web service's Call and I have some 
  strange results.
 
  First of all,
  My web service is on a Axis2 1.5.1 framework,
  I use a Apache Tomcat 6.0.20 / JRE (server mode) 1.6.0_20-b02.
  I use JMeter 2.3.4 to do my benchmark.
 
  When I analyze my result, I have some nice (and stable ) things but 
  some times I observe a huge decrease of Hit/second and a huge 
  increase of response time.
  For example, normal response time is (avg) 300 ms and it increase to 
  1.000 ms and more, at the same time the hit/second decrease from 90 
  to 40.
 
  I watch the CPU activity to see if the bottleneck is here and I 
  observe that I have the same thing.
  When the response time increase, the CPU activity fall down from 40% 
  to 10%.
  I watch disk time access too and I don't observe a link between this 
  activity and the fall of performance.
 
  I try to attach my graph to this mail but I don't know if it's okay 
  on the mailing list.
  I don't understand why some time the performance fall down.
  So, if you are some ideas...
 
  Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. Sign 
  up now.
 
  -
  To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
  For additional commands, e-mail: users-h...@tomcat.apache.org
  
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