Latency and Tomcat 3.2.4

[rbyrne@xxxxxxxxxxxxxxx]

Hi,

I've been looking into Tomcat on the iSeries for the past couple of 
months. I've successfully migrated a small IIS application we use in house 
to Tomcat rewriting it with Java/Jsp using the Struts framework. I stress 
tested the application and the results where great i.e. circa 100ms for a 
response. We put the application into pilot production. What we noticed 
was that due to the infrequent use of the application initial requests had 
a very poor response time however subsequent requests were fine. So in 
essence if the application was left idle for a period analysis has shown 
that the idle interval doesnt necessarily have to be a long one, the 
initial request is slow, so there is a lag. 

I've been trying all sorts to try and minimize/elimate the lag by 
adjusting priorities, running tomcat inprocess/out of process, setting up 
a seperate memory pool for my http instance. Our iSeries has automatic 
tuning switched on and is tuned heavily for interactive. I've been told by 
our iSeries admin that switching the automatic tuning off is not an 
option.

I would like not having to resort to leaving a stress test running 
constantly to keep the application responding.

I'm wondering if anyone has seen the following behaviour of if anyone can 
suggest an explanation/solution.

Thanks and kind regards,
Robert.
********************************************************************
This email and any files transmitted with it are confidential and 
intended solely for the use of the individual or entity to whom they 
are addressed. If you have received this email in error please 
notify us immediately at MailMonitor@xxxxxxxxxxx and delete this E-mail 
from your system. Thank you.
It is possible for data transmitted by email to be deliberately or
accidentally corrupted or intercepted. For this reason, where the
communication is by email, the Bank of Ireland Group does not accept 
any responsibility for any breach of confidence which may arise 
through the use of this medium.
This footnote also confirms that this email message has been swept 
for the presence of known computer viruses.
********************************************************************