Keep Alive off ?

Hello,
I'm currently looking into mathopd as an apache alternative for a site 
serving gif trackers that websites can include on their pages to get some 
traffic statistics.
These trackers are used by some very large sites (several hundreds of people 
online at the same time), and apache's one process per child is hitting hard 
on my server. 

However before i go on and try mathopd, i need to be sure that there is an 
equivalent to apache's keep-alive off. Indeed, the trackers are generally 
only downloaded once every little while by each client, and only one of them 
for every page, so there's really no advantage in keep alive, plus 
considering the huge number of different clients connecting to the server 
it's important to close requests asap. 

I've looked through the documentation but i'm not sure i have seen a 
reference to such a feature, does it exist ? Is this done using Timeout, or 
Wait ? 

Any suggestions for an optimized configuration for a service as the one 
described ?
Thanks!
Quentin