On Wed, 21 Mar 2001 [EMAIL PROTECTED] wrote:
> Greetings all! Can anyone tell me about how the execution threads work
> between JBoss and Tomcat, and how many there are, can we change them,
> etc.?
>
> We've put a slew of timing debug statements in our code to try to narrow
> down
> a perceived bottle-neck in JBoss. We dump 100 virtual users on the box
> and
> see our execution time getting successively longer and longer. It's
> almost as
> if there are only a couple of threads executing concurrently.
Execution time gets longer _while_ the load ramps up or after it is
ramped up?
>
> For each user coming in, they hit a jsp page (which should be a unique
> session
> id for each user, which we have verified is so) which then is linked to a
> stateful
> session bean (which should also be a unique id for each user). That EJB
> then
> uses a second stateful session EJB to make a telnet call out to a legacy
> data source.
Does this have to be stateful? Where is it removed?
>
> That call from the second EJB to the data source takes 219 milliseconds.
Is this consistent?
> When it
> returns, the first EJB does some processing on it (which involves string
> tokenizing
> the results and stuffing it into vectors...blah blah). When that returns
> back to the
> servlet class, we are seeing the time becoming longer and longer.
The time between the completion of the call to the second bean an the
return, or ???
>
> We've inspected and re-inspected the code for "gotchas" and think we have
> it
> pretty clean.
>
> Is there something in that 'boundary' between Tomcat and JBoss that only
> allows
> "so much" to be done??
>
> Any and all information would be appreciated. We are grasping at straws
> now....
>
> Robert
>
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--
Dan Christopherson (danch)
nVisia Technical Architect (www.nvisia.com)
Opinions expressed are mine and do not neccessarily reflect any
position or opinion of nVISIA.
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