Performance Tuning: stand-alone vs. enterprise

[NDMsw]

We had significant performance issues where our Jrun began to consume more and
more of the processor as it tried to serve pages to 300 or so users. The
application may be to blame, but we don't feel we can make that assessment
without knowing whether there is something in the CF setup to consider.

When looking at the techrepublic.com.com/5100-22-5163972.html# that talked
about this setting and described behavior similar to that we were seeing.

We pursued that glimmer of hope only to find that the setting was not present.
Our ColdFusion Administrator indicated that it's not available on our server
because we're using the Enterprise setup. He also indicated that it is best to
let the Web Server handle the number of requests, but I'm not sure this is the
same thing... He knows a lot more than I do, but I couldn't help wondering
whether or not there is another way to tweak this setting.

Are there significant differences in the way that stand-alone and enterprise
setups should be optimized for performance? Is there a place to adjust the max
sim requests in enterprise CF?

(BTW, In the end, load testing revealed that at about 25 users, service starts
to degrade significantly. So we ended up using the web server to allow no more
than 25 users to access our sites. This isn't an acceptable long-term
solution, but it ensures decent service for that number of users.)

Thanks!!

[Neculai Macarie]

> We had significant performance issues where our Jrun began to consume more
and

> more of the processor as it tried to serve pages to 300 or so users. The
> application may be to blame, but we don't feel we can make that assessment
> without knowing whether there is something in the CF setup to consider.
>
> When looking at the techrepublic.com.com/5100-22-5163972.html# that

talked

> about this setting and described behavior similar to that we were seeing.
>
> We pursued that glimmer of hope only to find that the setting was not

present.

> Our ColdFusion Administrator indicated that it's not available on our

server

> because we're using the Enterprise setup. He also indicated that it is

best to

> let the Web Server handle the number of requests, but I'm not sure this is

the

> same thing... He knows a lot more than I do, but I couldn't help

wondering

> whether or not there is another way to tweak this setting.
>
> Are there significant differences in the way that stand-alone and

enterprise

> setups should be optimized for performance? Is there a place to adjust

the max

> sim requests in enterprise CF?
>
> (BTW, In the end, load testing revealed that at about 25 users, service

starts

> to degrade significantly. So we ended up using the web server to allow no

more

> than 25 users to access our sites. This isn't an acceptable long-term
> solution, but it ensures decent service for that number of users.)

In CF admin you can set the number of simultaneous connections to the
server. I think that 25 is the default number for the Enteprise edition.
You'll need to allow webserver to handle much more requests then that
because he also handles static files (css, js, images) and set the
simultaneous connections number to 25 from CF admin.

--
<mack />

[NDMsw]

Thanks, Neculai. The only trouble is, I don't see a simultaneous connections
setting in the Server Settings. Here are exactly the settings available:

"Server Settings
Click the button on the right to update Server Settings...

(unchecked) Timeout Requests after ( seconds ) _60_
When checked, requests that take longer than the specified time are
terminated. This prevents unusually long requests from occupying server
resources and impairing the performance of other requests.

(unchecked) Use UUID for cftoken
Configures the cftoken cookie to use a UUID as a token identifier, rather than
a random number. A UUID guarantees a unique identifier for the token.

(checked) Enable HTTP status codes
Enables ColdFusion MX to set status codes when unhandled error pages occur.

Missing Template Handler_________________(blank)
Specify the relative path to a template to execute a cfinclude tag cannot find
a requested template.

Site-wide Error Handler_________________(blank)
Specify the relative path to a template to execute when the ColdFusion
Application Server encounters errors while processing a request."

Also, if that setting is available somewhere, should it be set to 25 or to the
number recommended setting for "max simultaneous requests" (i.e. 3-4 times the
number of processors)?

[NDMsw]

I found my way onto Sarge's 50% posting and think I found my answer.
(***Thanks, Sarge!!***)

It seems that the Enterprise configuration does have such a setting, just not
at the top level. I'm guessin so that it can be set for each jrun vs.
globabally.