Re: Measuring web service performance

["Haas, Matt (CL Tech Sv)" <matt.haas@xxxxxxxxxxx>]

Actually, if you are just using the IBM documentation, you are missing out on a lot of the features of the Apache HTTP server. IBM's documentation for the i specific stuff is okay but compared to the documentation on the main Apache site, it blows chunks.

Matt

-----Original Message-----
From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Dean.Eshleman@xxxxxxxxxxxxxx
Sent: Friday, August 28, 2009 9:38 AM
To: Web Enabling the AS400 / iSeries
Subject: Re: [WEB400] Measuring web service performance

Nathan,

Actually, Matt Haas told me about the %D parameter.  I guess Robert found 
it in the documentation.

Apache logging was turned on because I can see the request in the HTTP 
access log.  This is in a QA environment and no one else was calling the 
web services.  I executed the web service call in SOAPUI and when it 
finished I looked at the access log right away.  The response size in 
bytes does match between SOAPUI and the HTTP access log.  It is just 
strange why the response times don't match.  If anything, I would expect 
the response time in SOAPUI to be a little longer than what is in the HTTP 
access log rather than the reverse.

Dean




Nathan Andelin <nandelin@xxxxxxxxx> 
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08/27/2009 06:17 PM
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Re: [WEB400] Measuring web service performance






Dean,

Where did you find the "%D" log format option? I've looked at the 
documentation at apache.org and also at the IBM i Information Center.  But 
I can't find it.

Was Apache logging turned OFF when you tested from SOAPUI.  I can see 
logging itself adding some overhead.

Nathan.




----- Original Message ----
From: "Dean.Eshleman@xxxxxxxxxxxxxx" <Dean.Eshleman@xxxxxxxxxxxxxx>
To: web400@xxxxxxxxxxxx
Sent: Thursday, August 27, 2009 2:17:01 PM
Subject: [WEB400] Measuring web service performance

Hi,

I'm trying to capture some information about the performance of our web 
services on the System i.  I modified the Apache config file by adding the 

%D parameter to the log format.  It is my understanding that this will 
show the length of time that it took to execute the request in 
microseconds.  I'm using SOAPUI as my testing tool to call the web 
service.  In SOAPUI, I see a response time of 419 milliseconds (.419 
seconds).  In the Apache access log, I see a response time of 919632 
microseconds (.919 seconds).  Why don't these two match more closely? What 

am I missing?

Dean Eshleman,
MMA, Inc.