Re: Make Tomcat run slow

2007-04-08 Thread Leon Rosenberg

You could write a valve for tomcat, put that into server/libs and
configure your tomcat via server.xml to use it. This valve could
basically sleep 1 second or longer before allowing the tomcat to
continue with request processing. This was you willnot modify the
webapp neither slow down the entire machine. Just your tomcat
instance.

regards
Leon

On 4/7/07, L.W. van Braam van Vloten <[EMAIL PROTECTED]> wrote:

Thanks for this reply!

Shankar Unni wrote:
 > * Renice these make-work processes so that they are at the highest
 > priority (not real-time, though, or you'll have to reboot your box :-);
 > and renice the Tomcat so that it's at the lowest priority.

Unfortunately this will not work:
- I can not modify the code for my webservice
- I need to slow down only my own implementation om Tomcat, and most
definately not the entire machine! I am not by far the only user of this
machine, my entire company depends on it :)

Besides, I have no idea how to renice a process on a modern iSeries so
that it runs unimaginably slow...

Greetings, Lucas



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Fwd: Re: Make Tomcat run slow

2007-04-07 Thread Nicholas Sushkin
If you only want to slow down the network connection to test how your 
application would behave on a slow link, I can recommend Charles reverse 
proxy. It's an inexpensive Java tool I use in debugging my web 
applications. Among other amazing things, it can "slow down" or "throttle" 
your connection, making your application appear slow to the client without 
slowing down the whole machine. Take a look at 
http://www.xk72.com/charles/wiki/bandwidth_throttle

ps. I am not affiliated, just a happy user.

--  Forwarded Message  --

Subject: Re: Make Tomcat run slow
Date: Saturday 07 April 2007 08:52
From: "L.W. van Braam van Vloten" <[EMAIL PROTECTED]>
To: Tomcat Users List 

Thanks for this reply!

Shankar Unni wrote:
 > * Renice these make-work processes so that they are at the highest
 > priority (not real-time, though, or you'll have to reboot your box :-);
 > and renice the Tomcat so that it's at the lowest priority.

Unfortunately this will not work:
- I can not modify the code for my webservice
- I need to slow down only my own implementation om Tomcat, and most
definately not the entire machine! I am not by far the only user of this
machine, my entire company depends on it :)

Besides, I have no idea how to renice a process on a modern iSeries so
that it runs unimaginably slow...

Greetings, Lucas

---

-- 
Nicholas Sushkin, Senior Software Engineer
Open Finance, Chelsea Piers Pier 62 Suite 316, New York NY 10011
Tel +1 646 723 2790 Fax +1 646 723 2789 [EMAIL PROTECTED]


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Re: Make Tomcat run slow

2007-04-07 Thread Christopher Schultz
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Lucas,

L.W. van Braam van Vloten wrote:
> Unfortunately this will not work:
> - I can not modify the code for my webservice
> - I need to slow down only my own implementation om Tomcat, and most
> definately not the entire machine! I am not by far the only user of this
> machine, my entire company depends on it :)

If you can't modify your webapp, and you can't modify the machine, then
you basically can't do what you are trying to do. :(

If you just need to simulate some network lag time, you could use a
firewall to block traffic until you get a timeout. Presumably you can
find a port to block that will stall your webapp...

- -chris

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Re: Make Tomcat run slow

2007-04-07 Thread L.W. van Braam van Vloten

Thanks for this reply!

Shankar Unni wrote:
> * Renice these make-work processes so that they are at the highest
> priority (not real-time, though, or you'll have to reboot your box :-);
> and renice the Tomcat so that it's at the lowest priority.

Unfortunately this will not work:
- I can not modify the code for my webservice
- I need to slow down only my own implementation om Tomcat, and most 
definately not the entire machine! I am not by far the only user of this 
machine, my entire company depends on it :)


Besides, I have no idea how to renice a process on a modern iSeries so 
that it runs unimaginably slow...


Greetings, Lucas



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Re: Make Tomcat run slow

2007-04-06 Thread Shankar Unni

L.W. van Braam van Vloten wrote:

So my question is: would there be an easy way to make Tomcat on my 
iSeries machine run rediculously slow? 


Lots of funny replies come to mind, but the simplest is:

* Run a process that just spins forever:

   while (1) ;

  Run as many of these as you have CPUs.

* Renice these make-work processes so that they are at the highest 
priority (not real-time, though, or you'll have to reboot your box :-); 
and renice the Tomcat so that it's at the lowest priority.


Relax, and enjoy the scenery while Tomcat groans and wheezes..


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