Red Hat Bugzilla – Bug 137921
gnome-system-monitor reports the wrong values for "Used memory: xMB of xMB" on the resource monitor tab.
Last modified: 2014-06-18 05:07:36 EDT
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Description of problem:
gnome-system-monitor reports the wrong values for "Used memory: xMB of
xMB" on the resource monitor tab.
see attached screen capture which shows gnome-system-monitor in the
foreground and top behind it to demonstrate that the memory
used/unused values are clearly wrong.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Run gnome-system-monitor and compare the "used memory" values to TOP
Actual Results: used memory is wrong
Expected Results: used memory should reflect reality.
Created attachment 106091 [details]
screenshot showing wrong memory values
gnome-system-monitor is correct in that it doesn't include the
buffers/cache memory. This memory is not really used (read: occupied)
in the normal way, but is just used temporarily by Linux to increase
performance, because else it would be completely unused. In output of
"top", subtract the amount of memory listed in the columns "buffers"
and "cached". Compare with what the "free" command displays as "used"
in the second line. With the usual 1000 KB = 1 MB => 1024 KiB = 1 MiB
conversions, the values are equal.
True, but I believe top's value is more useful, because the point where top
reports memory as 'all used' is the point where performance starts to degrade.
Fedora Core 3 is now maintained by the Fedora Legacy project for security
updates only. If this problem is a security issue, please reopen and
reassign to the Fedora Legacy product. If it is not a security issue and
hasn't been resolved in the current FC5 updates or in the FC6 test
release, reopen and change the version to match.
In FC5 the label is "user memory" for system monitor. This does not directly
coorelate to `top` which simply says "used"