"data" size is unreliable, start using RES, as it seems reliable and relevant #10161
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According to https://www.kernel.org/doc/html/latest/filesystems/proc.html "data" aka "drs" is broken.
In practice most of the time it shows a number somewhere between RES and VIRT, but it seems to be completely off in multi-threaded processed once in a while.
So move to the same number top(1) displays as "RES". This number is not marked broken and top(1) and the metrics agreed all the time in my tests.
Should fix #7591
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