Dear Andrew,
Andrew Smith wrote:
>
> The other big possibility for the swapping is cache/buffers used by
> the system. Try
>
> cat /proc/meminfo
>
> to see if linux itself is using up a lot/most of your memory.
> What happens is that linux will use up as much 'spare' memory as
> is available for cache/buffering.
> It will free up some when processes need it.
That's what I read about somewhere and I wasn't sure how to detect if
our effect is related to that. I just tried the cat /proc/meminfo on
my own maschine, and the results look like this:
[urmel@tiger urmel]$ cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 2108166144 1389498368 718667776 4251648 36659200 838594560
Swap: 1850646528 134479872 1716166656
MemTotal: 2058756 kB
MemFree: 701824 kB
MemShared: 4152 kB
Buffers: 35800 kB
Cached: 687612 kB
SwapCached: 131328 kB
Active: 408756 kB
Inact_dirty: 196000 kB
Inact_clean: 254136 kB
Inact_target: 524148 kB
HighTotal: 1179100 kB
HighFree: 214860 kB
LowTotal: 879656 kB
LowFree: 486964 kB
SwapTotal: 1807272 kB
SwapFree: 1675944 kB
I have 2GB RAM, and MemFree reports that there are 700KB left to
allocate.
Now when I have a look at the top (sorted by memory):
7:00am up 23 days, 15:52, 12 users, load average: 0.20, 0.11, 0.09
137 processes: 132 sleeping, 5 running, 0 zombie, 0 stopped
CPU0 states: 9.1% user, 15.3% system, 0.0% nice, 75.0% idle
CPU1 states: 15.1% user, 9.2% system, 0.0% nice, 75.1% idle
Mem: 2058756K av, 1356652K used, 702104K free, 4152K shrd, 35824K
buff
Swap: 1807272K av, 130980K used, 1676292K free 688264K
cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
17764 urmel 9 0 214M 167M 9252 S 0.0 8.3 16:23
netscape-commun
16492 root 9 0 288M 25M 4744 R 0.3 1.2 370:30 X
17113 glanger 9 0 7760 6504 2264 S 0.0 0.3 0:01 xterm
16965 urmel 9 0 6104 5688 4184 S 0.0 0.2 2:43 panel
1265 glanger 9 0 4952 4904 2708 S 0.0 0.2 0:01 emacs
1334 xfs 9 0 6524 4696 1976 S 0.0 0.2 0:06 xfs
16894 urmel 9 0 4584 4480 2376 S 0.1 0.2 19:15 sawfish
17062 urmel 9 0 4848 4344 3448 S 0.0 0.2 3:40
tasklist_applet
916 root 9 0 7444 4284 688 S 0.0 0.2 1:48 ypserv
9830 urmel 9 0 4240 4240 3320 S 0.0 0.2 0:00
gnome-terminal
9672 urmel 9 0 4096 4096 3248 S 0.0 0.1 0:00
gnome-terminal
17017 urmel 9 0 4172 3948 3408 S 0.0 0.1 3:34
deskguide_apple
13912 urmel 10 0 4040 3856 3244 S 2.1 0.1 221:12 gtcd
20788 urmel 9 0 4104 3832 3248 S 0.0 0.1 0:02
gnome-terminal
1159 glanger 9 0 4264 3812 1748 S 0.0 0.1 2:19 xterm
16967 urmel 9 0 4396 3688 3136 S 0.0 0.1 0:13 gmc
I just can't see why those 1.3GB RAM should be un-usable. (and it seems
I'm
facing the same effect not only on the one machine I mentioned :-) ).
Kind regards,
Urte
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