1. Large number of queued messages in the COMMQ file: If there's no z/OS job running (i.e., no tracking needed), execute the following zOS Agent modify command to delete all the queued messages: /F zosagm,ESPCOM FLUSH DEST(-)
2. Large job output: Use the zOS Agent initialization statement MSGLIMIT to limit the number of SYSOUT statements retrieved.
Example: MSGLIMIT 5000
Explanation: When the user retrieves the spool output from CA dSeries, only the first 5000 statement will be retrieved. In addition, the user gets a message box containing "event ... terminated due to msg limit exceeded".