There goes all my memory

I have installed QNX to play around with and do a little development on,
although any time I start photon and then the package manager, QNX uses all
my memoy (RDRAM 128M). I need to run the package manager in order to install
the development tools.
I have tried killing of some applications running, but no luck.

Can anyone suggest how I can reduce the amount of memory it is using.