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 output from iPhone is different from the top on Linux: PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS  RPRVT  RSHRD  RSIZE  VSIZE 1875 emma         0.0%  0:30.83   7   139    932 17868K  5328K    29M   181Mroot# ps -eo pid,rss,vsz|grep 1875 1875  29324   441324
Why the value of VSIZE in top is different from the value of VSZ (Virtual set size) in ps?
osx;ps;top;iphone;ios