Q: force Apache2 to use single process model

Hi,

My app. server recommends Apache2 to run as single process model. I have
compiled MPM worker but could not get it working in single process,
multi-thread model.

I have tried setting ServerLimits and StartUpServer both to 1, I still have
three httpd processes, one is the control process and the other two are the
worker processes. But I only want one worker process, i.e., single process
model. In addition, no matter what I set to StartUpServers, I always get two
httpd child processes running.

The configure file and compiler options are all correct, as changes in other
configure parameters take effect, and httpd -l shows worker.c. I even
debugged Apache and all the values are read in correctly. Except for not
running as a single process, Apache functions well.

I also tried switching to MPM perchild and set NumServers to 1, had the same
situation, still got two child processes running.

What did I miss and how can I debug this?
Thanks.
Yan