Checking your job status with SM50 (processor type BTC) is more accurate then SM37. SAP updates the tables TBTCO wheneveryour background jobs status change. If SAP is shutdown, the currentjobs might not be update ontime to the table. (e.g. a background job wasshown as Active (SM37), in fact it real status should be Cancelled.

The type of work process:

• DIA - work process for executing dialog steps in user transactions
• UPD - update process for executing U1 (time-critical) database changes
• UP2 - update process for executing U2 (non-critical) database changes
• ENQ - for setting and releasing locks on SAP lock objects
• BTC - for executing background jobs
• SPO - for spool formatting processes