/var has only 0% free

Hello Everyone,

I am facing an issue with an F5 3900 appliance. The system is broadcasting the following message:

011d0004:3: Disk partition var has only 0% free

Upon running df -h command, I see the below output:

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg--db--sda-set.3.root
                      380M  229M  132M  64% /
/dev/mapper/vg--db--sda-set.3._config
                      3.0G   77M  2.8G   3% /config
/dev/mapper/vg--db--sda-set.3._usr
                      2.7G  2.0G  633M  76% /usr
/dev/mapper/vg--db--sda-set.3._var
                      3.0G  2.8G   22M 100% /var
/dev/mapper/vg--db--sda-dat.share.1
                       30G  3.8G   25G  14% /shared
/dev/mapper/vg--db--sda-dat.log.1
                      6.9G  175M  6.4G   3% /var/log
none                  3.0G  972K  3.0G   1% /dev/shm
none                  3.0G   29M  2.9G   1% /shared/rrd.1.2
none                  3.0G   18M  3.0G   1% /var/tmstat
none                  3.0G  1.2M  3.0G   1% /var/run
prompt                4.0M   28K  4.0M   1% /var/prompt
none                  3.0G     0  3.0G   0% /var/loipc
/dev/mapper/vg--db--sda-app.ASWADB.set.3.mysqldb
                       12G  837M   11G   8% /var/lib/mysql
/dev/mapper/vg--db--sda-app.avr.dat.avrdata
                      3.8G   65M  3.5G   2% /shared/avr
/dev/mapper/vg--db--sda-app.asm.dat.asmdata
                      3.8G   65M  3.5G   2% /var/asm

When I run the diskmonitor command:

Broadcast message from root (pts/0) (Sun Aug  7 13:14:02 2016):

011d0004:3: Disk partition var has only 0% free

I tried clearing all unnecessary files from /var/log and /var/tmp, also removed all old UCS files, removed old ISO files in F5 images and hotfixes but still same error persists. Also looked at SOL14403

When I run the command to check the top 20 files, below is what I get:

23064   /var/lib/rpm/Packages
15516   /var/sam/www/webtop/public/download/mac_edgesvpn.pkg.zip
15044   /var/sam/www/webtop/public/download/SWGUserIdentificationAgents.exe
12916   /var/db/mcpdb.bin
12824   /var/sam/www/webtop/public/download/mac_edgeclient.mpkg.zip
6828    /var/ts/var/tmp/sigfile.tmp.9411/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.9411/negsig_version_0002/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.7001/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.7001/negsig_version_0002/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.6641/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.6641/negsig_version_0002/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.5190/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.479/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.479/negsig_version_0002/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.28641/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.28641/negsig_version_0002/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.25974/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.25974/negsig_version_0002/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.23594/sigs/all_signatures.xml
6828    /var/ts/var/tmp/sigfile.tmp.23594/negsig_version_0002/sigs/all_signatures.xml

I am not sure what to do next. Your help is appreciated.