Hi, I am new to OS X, but I think I have basic understanding of memory management; clearly not enough Here is the thing: I have 5.6GB of free memory (right after reboot; 8GB installed). All seems well, but I constantly see pages coming in in activity monitor; so far 512MB came in. There is no paging out which is expected considering there is enough free memory to use. Granted, I have 208GB VM size; frankly this is strange ... I always thought that you first need to page out stuff from physical memory to HD before you can page in. What is coming in anyways? The only thing that comes to my mind is System resume; I did restarted applications from last time. Is it possible that stuff stayed "paged out" and is come in? I guess I could do clean restart to test that I wish to understand what is going on so any information is welcome. Cheers, R> btw, I am using mini server with 10.7.2 and 8GB of memory (freshly installed).