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Are your numbers the VM size, or the RSS?

On the laptop I'm writing this from, I've got a Chrome process with 827 MB of VM size -- but only 62 MB of pages actually in use. The rest is large memory-mapped regions consisting mostly of untouched pages -- which makes sense, because on a 64-bit machine, virtual address space is practically free.



Figures are taken from the "private" column of chrome://memory-redirect/

Chrome says: "This is the best indicator of browser memory resource usage"


Ok, that should be the RSS -- unless it's broken on your platform, which is entirely possible, of course.


When I visit chrome://memory-redirect/, I see this message:

  (Bug: We seriously overcount our own memory usage: Issue 25454.)
Issue 25454: http://code.google.com/p/chromium/issues/detail?id=25454




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