Running purge command in the terminal to free the inactive memory isn't really what I think about Apple.
Lion isn't doing a great at all when it comes to free the inactive memory.
Free memory is reaching 16 MB and applications and the OS are becoming unresponsive, yet OS X isn't reclaiming the inactive memory.
After each session, I put the laptop to sleep. You can say that I shutdown my OS once a month. Unixes after all aren't created to be rebooted.
OS X Snow Leopard was pretty sleek, I don't know but it looks it is a Lion thing (maybe due iOS brought to Lion features).
Any better way to reclaim the inactive memory on Lion?
[EDIT]
I got 4 GB of RAM
Best Answer
Yes, you can, one command only (run in Terminal):
And recheck inactive RAM