When a command job is defined without std_out_file clause in the job definition,
the output of command will be logged in the agent spool directory.
This may cause the agent file system to get full and causing agent to crash when the volume of the job output exceeds the disk capacity.
If the following parameter is already set in "agentparm.txt" file :
the spool cleanup will be activated only after the job is completed successfully.
While the disk space issue may occur while the job is still running. On the other hand, client may want to remove the standard output logging to the spool only for some jobs only.