cache available RAM #692

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opened 2026-02-27 02:03:10 +03:00 by kerem · 4 comments

kerem commented

2026-02-27 02:03:10 +03:00

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Originally created by @UltimateByte on GitHub (Jun 5, 2016).
Original GitHub issue: https://github.com/GameServerManagers/LinuxGSM/issues/862

Originally assigned to: @UltimateByte on GitHub.

Sample output from ./gameserver details

Performance
Uptime:    51d, 4h, 45m
Avg Load:  0.65, 0.85, 1.02

Mem:       total   used   free
Physical:  31G     29G    1.8G
Swap:      1.0G    185M   836M

Sample output from free -m


gameserver@game:~$ free -m
             total       used       free     shared    buffers     cached
Mem:         32205      30395       1809        659        370      20779
-/+ buffers/cache:       9246      22958
Swap:         1021        185        836

We need to display the -/+ buffer/cache, otherwise it's not representative from real RAM available for applications.

Originally created by @UltimateByte on GitHub (Jun 5, 2016). Original GitHub issue: https://github.com/GameServerManagers/LinuxGSM/issues/862 Originally assigned to: @UltimateByte on GitHub. Sample output from ./gameserver details ``` Performance Uptime: 51d, 4h, 45m Avg Load: 0.65, 0.85, 1.02 Mem: total used free Physical: 31G 29G 1.8G Swap: 1.0G 185M 836M ``` Sample output from free -m ``` gameserver@game:~$ free -m total used free shared buffers cached Mem: 32205 30395 1809 659 370 20779 -/+ buffers/cache: 9246 22958 Swap: 1021 185 836 ``` We need to display the -/+ buffer/cache, otherwise it's not representative from real RAM available for applications.

kerem

2026-02-27 02:03:10 +03:00

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kerem commented

2026-02-27 02:03:11 +03:00

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@cedarlug commented on GitHub (Jun 6, 2016):

Just an aside: Running Debian Sid/Stretch, the free in procps 2.3.3.11-3 shows available in the first line of output and does not display the 2nd line -/+ buffers/cache:

Here's what I see:

cedarlug@delli7:~$ cat /etc/debian_version 
stretch/sid
cedarlug@delli7:~$ which free
/usr/bin/free
cedarlug@delli7:~$ grep /usr/bin/free /var/lib/dpkg/info/*.list
/var/lib/dpkg/info/procps.list:/usr/bin/free
cedarlug@delli7:~$ dpkg -l | grep procps | grep -v lib
ii  procps                                2:3.3.11-3                           amd64        /proc file system utilities
cedarlug@delli7:~$ free -m
              total        used        free      shared  buff/cache   available
Mem:           7801        1289        3634         206        2878        6058
Swap:          8282           0        8282

@cedarlug commented on GitHub (Jun 6, 2016): Just an aside: Running Debian Sid/Stretch, the `free` in procps 2.3.3.11-3 shows `available` in the first line of output and does not display the 2nd line `-/+ buffers/cache:` Here's what I see: ``` bash cedarlug@delli7:~$ cat /etc/debian_version stretch/sid cedarlug@delli7:~$ which free /usr/bin/free cedarlug@delli7:~$ grep /usr/bin/free /var/lib/dpkg/info/*.list /var/lib/dpkg/info/procps.list:/usr/bin/free cedarlug@delli7:~$ dpkg -l | grep procps | grep -v lib ii procps 2:3.3.11-3 amd64 /proc file system utilities cedarlug@delli7:~$ free -m total used free shared buff/cache available Mem: 7801 1289 3634 206 2878 6058 Swap: 8282 0 8282 ```

kerem commented

2026-02-27 02:03:11 +03:00

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@UltimateByte commented on GitHub (Jun 6, 2016):

Crap.

root@game:/home/ultimatebyte# cd
root@game:~# cat /etc/debian_version
8.4
root@game:~# which free
/usr/bin/free
root@game:~# grep /usr/bin/free /var/lib/dpkg/info/*.list
/var/lib/dpkg/info/procps.list:/usr/bin/free
root@game:~# dpkg -l | grep procps | grep -v lib
ii  procps                            2:3.3.9-9                    amd64        /proc file system utilities
root@game:~# free -m
             total       used       free     shared    buffers     cached
Mem:         32205      30107       2098        683        372      20782
-/+ buffers/cache:       8952      23252
Swap:         1021        185        836

How do we do for a universal solution ?
Manual substraction of the 1st line ?

@UltimateByte commented on GitHub (Jun 6, 2016): Crap. ``` root@game:/home/ultimatebyte# cd root@game:~# cat /etc/debian_version 8.4 root@game:~# which free /usr/bin/free root@game:~# grep /usr/bin/free /var/lib/dpkg/info/*.list /var/lib/dpkg/info/procps.list:/usr/bin/free root@game:~# dpkg -l | grep procps | grep -v lib ii procps 2:3.3.9-9 amd64 /proc file system utilities root@game:~# free -m total used free shared buffers cached Mem: 32205 30107 2098 683 372 20782 -/+ buffers/cache: 8952 23252 Swap: 1021 185 836 ``` How do we do for a universal solution ? Manual substraction of the 1st line ?

kerem commented

2026-02-27 02:03:11 +03:00

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@UltimateByte commented on GitHub (Jul 30, 2016):

Fixed just by adding cache info if available https://github.com/dgibbs64/linuxgsm/pull/944

@UltimateByte commented on GitHub (Jul 30, 2016): Fixed just by adding cache info if available https://github.com/dgibbs64/linuxgsm/pull/944

kerem commented

2026-02-27 02:03:11 +03:00

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@lock[bot] commented on GitHub (Jul 19, 2018):

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

@lock[bot] commented on GitHub (Jul 19, 2018): This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.