SM50 transaction is used to monitor and manage work processes.
You check the work processe and even cancel it if some work proccesseswhich are unwanted or taking too long time which are causing your systemto work properly.
Some times due to too many processes the system become slow.
Now if you want to delete then select the procees go to menu PROCESS?
Under process there are two option one is cancel with core and otheris cancel without core.
Try to cancel the processes using cancel without core option becauseif you cancel with core then the other dependent processes are also getcanceled.