CreateUUID and JRun/ColdFusion Performance Issue

Does anyone have performance issues with their FarCry running on
JRun/ColdFusion?
Responses on our website can be painstaking slow sometimes but great at
other times.

Is this a known problem with FarCry CMS? Is there a fix for this
problem?

We have so far tried various solution to addres the problem and have
also sought technical support from Adobe (Macromedia). As part of the
troubleshooting process several thread dumps were taken for analysis by
the Adobe technical support personnel.

This is what they have to say after their analysis:

Description of problem:
---------------------------------
When the ColdFusion server's system time changes the CFMX server will
become unresponsive. At best the server will hang for as long as the
time adjustment. If the adjustment is large (for example 2 minutes),
then every thread will hang for 2 minutes thereafter, and then
everything will resume. During these 2 minutes connections to the site
will accumulate in IIS and eventually time out, and new connections to
CFMX are queued until the queue fills and the new connections are then
refused.

If you are using the CreateUUID() function within your code this can
cause the system clock to accelerate. Normally this wouldn't be a
problem but the CreateUUID() function is dependent on time in order to
not create a duplicate value. It waits in a while loop for a number of
milliseconds and then returns a value. If the time jumps ahead it will
sit in this loop until it catches up with the system time. This can be
ugly if you have a lot of code calling CreateUUID().

Suggested solution:
-----------------------------
To work around this please see the following TechNote
http://www.adobe.com/go/tn_19007.

Outcome:
--------------
We have already applied the first suggested work around, i.e.

Added: " -XX:+ForceTimeHighResolution"  to the JVM arguments in
jvm.confg.

But it seems this work around doesn't fix the problem. They have now
suggested applying the following fix:

Since this is a problem with the underlying JVM and a system call in
the createUUID function, developers can either create their own UUID
generation code or download similar code from the ColdFusion Exchange.


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