System volume 'root' usage is 81%

[andy_vdg]

Hi guys,

I've got a root volume issue and have found the culprit (I think). 

# df -h
Filesystem      Size  Used Avail Use% Mounted on
tmpfs            10M  4.0K   10M   1% /dev
/dev/md0        4.0G  3.3G  393M  90% /
tmpfs           2.0G  4.0K  2.0G   1% /dev/shm
tmpfs           2.0G  3.8M  2.0G   1% /run
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
tmpfs           2.0G     0  2.0G   0% /media
/dev/md127      7.3T  6.1T  1.3T  83% /data
/dev/md127      7.3T  6.1T  1.3T  83% /home
/dev/md127      7.3T  6.1T  1.3T  83% /apps
/dev/md127      7.3T  6.1T  1.3T  83% /var/ftp/media

# du -csh /var/* --exclude ftp
0	/var/agentx
77M	/var/backups
53M	/var/cache
1.6G	/var/cores
50M	/var/lib
0	/var/local
4.0K	/var/lock
45M	/var/log
0	/var/mail
8.0K	/var/netatalk
0	/var/opt
3.5M	/var/readynasd
4.0K	/var/run
8.0K	/var/spool
0	/var/tmp
4.0K	/var/www
1.9G	total

So it seems that /var/cores is the problem. 

/var/cores# ls -All -h
total 1.6G
-rw------- 1 root root 1.6G Apr 16 19:40 core-java
-rw------- 1 root root 2.9M Apr 25  2015 core-mc
-rw------- 1 root root 186M Nov 22  2014 core-readynasd

Not sure why but since yesterday there is a 1.6GB core-java in the cores folder. 

Can I delete / move it? 

Thanks

Andy

[mdgm-ntgr · Accepted solution]

When a service crashes it can leave a core dump. Analysing the core dump can be useful for determining the cause of the problem. So you may prefer to move those to your data volume rather than delete them.

You can delete/move a core dump. The core dump for readynasd from 2014 is very old and unless you are still having issues with the management service you should be able to delete that.

[mdgm-ntgr · Accepted solution]

When a service crashes it can leave a core dump. Analysing the core dump can be useful for determining the cause of the problem. So you may prefer to move those to your data volume rather than delete them.

You can delete/move a core dump. The core dump for readynasd from 2014 is very old and unless you are still having issues with the management service you should be able to delete that.

[andy_vdg]

Awesome thanks - moved it to the data folder and all is good again. 

Back down to 45%. 

df -h
Filesystem      Size  Used Avail Use% Mounted on
tmpfs            10M  4.0K   10M   1% /dev
/dev/md0        4.0G  1.7G  2.0G  45% /
tmpfs           2.0G  4.0K  2.0G   1% /dev/shm
tmpfs           2.0G  3.8M  2.0G   1% /run
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
tmpfs           2.0G     0  2.0G   0% /media
/dev/md127      7.3T  6.1T  1.3T  83% /data
/dev/md127      7.3T  6.1T  1.3T  83% /home
/dev/md127      7.3T  6.1T  1.3T  83% /apps
/dev/md127      7.3T  6.1T  1.3T  83% /var/ftp/media