Zend Server questions and preformance issues

First off, background-

We are running V5R4. We are setting up a production/development
environment where we will have multiple IBM HTTP Server instances running
PHP. From everything I've read, this is a perfectly viable setup. We are
using the default FastCGI settings other than the location of the INI file.
In that INI file, everything is the same as the one shipped with Zend
Server other than a different include_path and error_log location. We are
running CGIDEV2 and PHP concurrently in the server same instance.
Production is running Zend Core and development is running Zend Server 5.

Here are some things I have noticed in our development environment:

First, I see PGM-zfcgi jobs under my development server with what appears
to be 6 child jobs each. That much I understand. What I don't understand
is why I see the PGM-zfcgi job and the 6 child jobs TWICE. Is that what I
should see?

Second, there is often a significant delay when I access a PHP script. By
significant delay I mean a noticeable delay of several seconds. After that
delay, performance is much better. In fact, it seems like performance gets
better and better as I continue to work. So Zend Optimizer sure seems to
be doing its job. That's the good news.

The bad news is when I go back to my CGI applications for a while or stop
accessing scripts to work on some code changes, when I come back, there is
another delay of several seconds. I am not restarting the HTTP Server and
it doesn't seem to be due to changes to the scripts because I've made
several quick changes that don't cause a delay. Has anyone else
experienced this and have you found a fix?

Matt

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