Re: RE: Tomcat deploy/undeploy speeds -- JAVA400-L

There is a utility in the OS that can at least help you identify if
something is working or not.

Go into qsh and enter the following. Details will follow.

/QIBM/ProdData/OS/OSGi/templates/bin/areVerify.sh -network

Tim Rowe, timmr@xxxxxxxxxx
Business Architect Application Development & Systems Management for IBM i
IBM i Development Lab, Rochester, MN
(507) 253-6191 (Tie) 553-6191

http://www-03.ibm.com/systems/power/software/i/are/index.html

----- Original message -----
From: "Kristen Henry" <klhnry@xxxxxxxxxxxx>
Sent by: "JAVA400-L" <java400-l-bounces@xxxxxxxxxxxx>
To: "'Java Programming on and around the IBM i'"
<java400-l@xxxxxxxxxxxx>
Cc:
Subject: RE: Tomcat deploy/undeploy speeds
Date: Thu, Nov 3, 2016 9:12 AM

Yes, I was going to mention this too but I am not an expert. We had
someone
'fix' a speed issue and they changed the CFGTCP on the domain entry from
*remote to *local and that fixed our issue. HOWEVER, someone doing this
has
to really understand what they are doing in DNS configuration...

Kristen

-----Original Message-----
From: JAVA400-L [[1]mailto:java400-l-bounces@xxxxxxxxxxxx] On Behalf Of
Tim
Rowe
Sent: Thursday, November 03, 2016 7:56 AM
To: java400-l@xxxxxxxxxxxx
Cc: java400-l@xxxxxxxxxxxx
Subject: Re: Tomcat deploy/undeploy speeds

One of the issues that I have seen in the world of Java, is the
configuration of your network. If you have DNS servers that are not
configured properly, you will see very slow performance as there is a
timeout for these. No errors, just the code is waiting for the DNS
to
respond, and then it proceeds. If the code is accessing something 50
times, that is 50 timeouts.

That would be the first thing I check.

Tim

Tim Rowe, timmr@xxxxxxxxxx
Business Architect Application Development & Systems Management for
IBM i
IBM i Development Lab, Rochester, MN
(507) 253-6191 (Tie) 553-6191

[2]http://www-03.ibm.com/systems/power/software/i/are/index.html

----- Original message -----
From: "James H. H. Lampert" <jamesl@xxxxxxxxxxxxxxxxx>
Sent by: "JAVA400-L" <java400-l-bounces@xxxxxxxxxxxx>
To: Java 400 List <java400-l@xxxxxxxxxxxx>
Cc:
Subject: Tomcat deploy/undeploy speeds
Date: Wed, Nov 2, 2016 3:25 PM

Fellow midrange geeks:

We have a number of customers for which we are managing Tomcat
servers
on their own Midrange boxes (to run the web extension of our CRM
product).

Differences in context deployment speeds is of course, in part, a
function of how long it takes to get a 101M WAR file onto their
machine.
But that wouldn't be a factor in undeployment, nor in starting or
stopping a context.

And we're finding wide variations in those speeds: sometimes, a
matter
of seconds, and sometimes you could go out and get coffee -- at the
Starbuck's around the corner -- and find that it's still
processing.

Sometimes, we'll see variations this extreme on boxes that are at
least
theoretically the same model. We've put Tomcat into its own
subsystem,
with its own private pool, and "throw memory at it," with little or
no
improvement in speed, and sometimes, we've seen boxes that look
tiny
and
underpowered give quicker responses than big heavy-duty models.

Anybody have any suggestions we haven't already tried?

--
JHHL
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