[plt-scheme] MzScheme maximum memory use

Hi all,

Am I correct in thinking the maximum amount of memory that MzScheme
can use on a 32-bit platform is 2GB?  I assume 32-bits - 1 tag bit =
31 bits for every pointer.  This would explain why we ran out of
memory on a machine with 3GB RAM and the web server's LRU manager set
w/ a max consumption of 2GB.

Thanks!
Noel