This information explains how to control the number of messages
queued to an extended console and the size of auxiliary storage that
an extended console can use for the message data space.
- The STORAGE field in MCSOP specifies the size of the message data
space created for the extended console. The range of the STORAGE field
is from 1 to 2048, where 1 represents 1 megabyte of data space storage
and 2048 represents 2048 megabytes, or 2 gigabytes, of data space
storage. The default for STORAGE is 1. The number of messages going
to your data space is limited by storage size. If you want to further
control the number of messages going to your data space, use the QLIMIT
parameter.
- The QLIMIT parameter on the MCSOPER macro specifies the maximum
number of messages queued to an extended MCS console. The value can
range from 1 to 2147483647 (2 billion). The default for QLIMIT is
2147483647. Taking the default might cause you to run out of storage
in the message data space.
- The ALERTPCT parameter on the MCSOPER macro specifies a percentage
of the QLIMIT value. When the number of messages queued to an extended
MCS console exceeds the number represented by this percentage, the
system alerts the extended MCS console by posting an ECB, identified
by the ALERTECB parameter. For example, if the QLIMIT value is 2000,
and the ALERTPCT value is 50, the system alerts the extended MCS console
user when the number of messages in the message data space exceeds
50%, or 1000 messages, of the QLIMIT.