.-IOMSGLIM--=--100---------------------. >>-+--------------------------------------+-------------------->< '-IOMSGLIM--=--number_of_message_pairs-'
| range: | 1–100 |
Limits the number of pairs of IST530I and IST1436I messages that are written for individual subareas by the IOPD facility. If the number of pending I/O operations for a subarea is greater than the value specified, then the IOPD facility writes only one message pair for each type of pending I/O operation for that subarea instead of one message pair per pending operation. The default value ensures that a message pair is written for each pending I/O operation.
Note: The default IOMSGLIM start option value is 100. This
will cause a summary message, IST9821, to be issued when the number
of IST530I message groups exceeds 100, preventing the console or PPO
to be flooded.
You can change the value of IOMSGLIM with the MODIFY VTAMOPTS command while VTAM® is running.