With 4GB RAM on my MBP I understand why 8GB is now the standard...
I am starting to suspect that upgrading from Snow Leopard to Mountain Lion on my MBP (see sig) was a mistake at least until I learn new habit patterns. Where before I could open applications without worry, now I have to watch the Activity Monitor to make sure I don't get too many apps open or I face the perpetual spinning beach ball. This is happening to me quite a bit. Once in this mode, most of my apps will not respond and I get a spinning ball that seems to last forever, even in the force shutdown window.
Maybe Apple should include a built in warning when opening another app, that you are about to exceed performance memory limitations for your hardware?
I don't know that much about Activity Monitor. What parameters should I be trying to keep or avoid? It seems that once an application has been opened and closed, it still hangs onto memory resources. Is there a way to free up memory without a restart? Thanks!
Update: A quick Google search revealed: this
MacLife Article and using 'purge' command in the Terminal. Extremely easy and it changed my Free memory from 47MB to 1.16GB. This is going to have to become a routine. Too bad there is no way to tell the system you always want tied up memory purged?
So why is OSX holding on to memory like this??
(Open terminal, and at the prompt type 'purge'. That's it.)