问题
When I monitor my application using instruments and the instrument "allocations" I see a big amount of memory being marked as "dirty". What does that mean? I have no memory leaks in my application yet this pile of "dirty" memory keeps increasing.
回答1:
Dirty is a computer term used to denote cached data that needs to be sync'ed with the main memory. Don't worry, since this is automatically done by the hardware.
回答2:
"...I am trying to find out what is using up all my memory."
The WWDC 2010 Session 311 presentation, Advanced Memory Analysis with Instruments, includes a section on 'Responding to Memory Warnings' (at ~38:40 in the video) with a demo that illustrates how to find "resident, dirty memory" with the Instruments VM Tracker and one way to flush it.
来源：https://stackoverflow.com/questions/6443606/what-is-dirty-memory-in-instruments