iOS is the operating system for the iPod, the iPhone and the iPad. Use this tag for questions about the UNIX foundations of iOS, or about interoperating with iOS devices. For other uses check

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Why the value of VSIZE in top is different from the value of VSZ (Virtual set size) in ps?

I know VSZ in ps is for the total address space allocated for the app and is sometimes aliased as vsize (mentioned in man page of ps on linux), but what's the definition of VSIZE in top? This top ...