[mp2] Memory not being shared

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Hello,

I'm having problems getting modules loaded at Apache start to be shared 
across the children. Here's the output I get from Apache::VMonitor (I've 
editted down to just 2 children):

    Size  Share VSize   RSS   M Elapsed LastReq Srvd
     ----- ----- -----  ---- --  ------ ------ ----
12: 89.5M  4.2M 89.5M 70.9M _  0.000s  0.000s    0
 8: 89.5M  4.2M 89.5M 70.9M _  0.000s  0.000s    0

Total:     1501392K (1432M) size, 1435471K (1369M) approx real size 
(-shared)

Both the totals and the individual numbers imply very little memory is 
being shared. As I understand the output from VMonitor, only 4.2M out of 
89.5M are being shared. (Yes, Apache is awfully big, that's my next step 
in optimization.)

I'm loading the vast majority of my modules in a startup.pl file, so I 
don't understand why they aren't being shared. Obviously, I am missing 
something. Any pointers on where I should look next would be very 
helpful. Here is the information about my system:

Fedora Core 2
perl 5.8.5 (threaded)
Apache 2.0.52 (pre-fork -- config params below)
mp2 2.0.0-RC4 (DSO -- config params below)
apreq2 (2/10/05 version)

Relevant parts of httpd.conf (CWApache::Apache2Handler is use'd in 
startup.pl):

 LoadModule perl_module modules/mod_perl.so
 LoadModule apreq_module       modules/mod_apreq.so
 ...
 PerlRequire /usr/local/apache2/mp/conf/startup.pl
 ...
 <Location / >
       SetHandler perl-script
       PerlResponseHandler  CWApache::Apache2Handler
 </Location>

Config params for apache and mod_perl:

 ./configure --prefix=/usr/local/apache2/mp --with-mpm=prefork 
--disable-cgi --disable-userdir --enable-auth-dbm --enable-speling

 perl Makefile.PL MP_APXS=/usr/local/apache2/mp/bin/apxs MP_INST_APACHE2=1

Thank you for any guidance!

Take care,

Kurt Hansen
khansen@xxxxxxxxxx.xxx