no space left on /var/lock/subsys while restarting a application Postifix

Found Postifix is giving an error saying no space left on /var/lock/subsys and Postfix stoped running, failing to create files onto /var/.

culprit was no free Inode left on /var ( use command to find Inode Status "tune2fs","df -hi" )

solution is delete /var/lib/amavis/spam* files ( keep in mind what to be deleted )