Hello, so I got interested in Smalltalk (again) installed Pharo and ran the ProfStef tutorial. I'm not a programmer, just interested :-) To be more precise, I followed the link on the Pharo homepage Download directory and installed from squeakvm.org/unix : Squeak-3.11.3.2135-solaris2.10_i386.tar.gz in - /usr/local/Squeak-3.11.3.2135-solaris2.10_i386 and from Pharo: Pharo-1.0-10515-rc3dev10.03.1 in my home directory. OS: OpenSolaris b127. Now while that worked --I can start Squeak (/usr/local/../bin/squeak.sh) chose the Pharo Image form the file browser that opens and go. Just following the integrated tutorial (ProfStef) and having maybe one more ClassBrowser open, at some point consumed 780 MB RAM (RSS). Question: Is that the expacted behavior (resource requirement) or is there something wrong with the steps I choose to run Pharo, although apparently they worked? There is a "PharoDebug.log" 180+kB large from that session, I can provide on request. (Didn't want to send it to whole list directly). Rudi