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Functions

peak amount of memory occupied by any process with "FOO" in its name

Terminal - peak amount of memory occupied by any process with "FOO" in its name
grep VmHWM /proc/$(pgrep -d '/status /proc/' FOO)/status
2014-11-05 15:06:29
User: michelsberg
Functions: grep
2
peak amount of memory occupied by any process with "FOO" in its name

Show the maximum amount of memory that was needed by a process at any time. My use case: Having a long-running computation job on $BIG_COMPUTER and judging whether it will also run on $SMALL_COMPUTER.

http://man7.org/linux/man-pages/man5/proc.5.html

VmHWM: Peak resident set size ("high water mark")

Alternatives

There are 17 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

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What others think

That's a very nice bit of /proc to know.

However the command is a bit crazy.

Also, if the command isn't running the output is junk.

First, I tried using sed:

grep VmHWM $(pgrep FOO | sed 's!.*!/proc/\0/status!')

A bit simpler to follow, but if the command doesn't exist, grep just sits there waiting.

What we needed was xargs:

pgrep FOO | xargs -rI{} grep -H VmHWM /proc/{}/status

xargs -r -- don't run if there are no matches

-I{} -- capital i, replace this string {} with the matches

grep -H -- force the display of the filename

Comment by flatcap 162 weeks and 2 days ago

Your point of view

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