Computer CI's getting Deleted

[Nishant16]

i am running a discovery to discover some of the computers in our environment, for some the host is not reachable if i run the quick discovery on the ip address, previously after running the discovery the Computer ci it got deleted, how can i troubleshoot or restrict the Computer ci's to be deleted in Servicenow

[Ashok Sasidhara]

Check whether any table cleaners are running. For this, go to table cleanup (sys_auto_flush) and check for records with Tablename=cmdb_ci_computer (Check also for other CMDB tables like this). Change Active=false to deactivate any unwanted table cleanup jobs running on CMDB tables to prevent deleting of CIs.