MONITOR SIZE field (MONSIZE subsystem parameter)

The MONSIZE subsystem parameter determines the default buffer size that is to be used for monitor traces when data is sent to monitor destinations.

Acceptable values: 1048576–67108864
Default: 1048576
Update: option 23 on panel DSNTIPB
DSNZPxxx: DSN6SYSP MONSIZE

You can enter the value in bytes (for example, 4194304) or use the abbreviation K for kilobytes (for example, 4096K) or M for megabytes (for example, 4M).