/dev/mapper/centos-root is 100% full

My /dev/mapper/centos-root is mapped to / and is 100% full. This is causing issues with services crashing and the server becoming unstable. However, I am not sure why this keeps happening. /home is far from full, where all user data is stored. I clear out /tmp with tmpwatch, I removed old logs in /var/log and any unnecessary files.

Code:

root@web508 [/]# df
Filesystem              1K-blocks      Used Available Use% Mounted on
/dev/mapper/centos-root  52403200  52192296    210904 100% /
devtmpfs                  3480112         0   3480112   0% /dev
tmpfs                     3489464         0   3489464   0% /dev/shm
tmpfs                     3489464     17004   3472460   1% /run
tmpfs                     3489464         0   3489464   0% /sys/fs/cgroup
/dev/mapper/centos-home 830664412 127473172 703191240  16% /home
/dev/sda1                  508588    164776    343812  33% /boot

and

Code:

root@web508 [/]# du -sh /*
0       /backup
0       /bin
136M    /boot
0       /dev
28M     /etc
170G    /home
4.0K    /ips.tar.gz
0       /lib
0       /lib64
0       /media
0       /mnt
4.0K    /razor-agent.log
591M    /root
17M     /run
0       /sbin
0       /scripts
0       /srv
0       /sys
0       /tsm

Any way to resolve this?

 

Thank you for your help.

Code:

root@web508 [~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   50G   50G   20K 100% /
devtmpfs                 3.4G     0  3.4G   0% /dev
tmpfs                    3.4G     0  3.4G   0% /dev/shm
tmpfs                    3.4G   58M  3.3G   2% /run
tmpfs                    3.4G     0  3.4G   0% /sys/fs/cgroup
/dev/mapper/centos-home  793G  122G  671G  16% /home
/dev/sda1                497M  161M  336M  33% /boot

and

Code:

root@web508 [/]# du -sch * --exclude=home
0       backup
0       bin
136M    boot
0       dev
28M     etc
4.0K    ips.tar.gz
0       lib
0       lib64
0       media
0       mnt
46M     opt
0       proc
4.0K    razor-agent.log
588M    root
58M     run
0       sbin
0       scripts
0       srv
0       sys
2.4M    tmp
0       tsm
11G     usr
39G     var
50G     total

 

Thank you! This definitely helped. Got rid of some data that was no longer needed.

I will do this. Since MySQL is used so much by hosting customers, it makes sense that its on the largest partition. Thanks for this!