In the output of "top" the value for RES changes constantly, why says the manpage that this is the value of memory used in the past instead of present time?

Solution Unverified - Updated -

Issue

  • In the output of top the value for RES changes constantly, why says the manpage that this is the value of memory used in the past instead of present time?
  • man top contains
     RES  --  Resident Memory Size (KiB)
           The non-swapped physical memory a task has used.

while this implies that the value would only grow. But the value is updated live, so the manpage should be changed into

     RES  --  Resident Memory Size (KiB)
           The non-swapped physical memory a task is using.

Environment

  • Red Hat Enterprise Linux, all versions
  • procps
  • top

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