Activity monitor file cache
In activity monitor it shows that I have 16GB of physical memory, 12.77 GB used memory, 16GB virtual memory.
It also shows App memory 1.9GB, FILE CACHE 9.56GB and wired memory 1.31GB.
My question is in regards to file cache at 9.56GB. What is file cache and why is it so high? Does this mean I should install more memory? I looked file cache up and I think it's memory that has been used but is not being used currently, it's waiting to be used again. Not sure if that's right though, or what it really means. Thanks for any help.
Late 2013 27" iMac, 3.4 GHz i5
16GB ram
OSX 10.9.4
iMac (27-inch, Late 2013), OS X Mavericks (10.9.2)