To dynamically adjust the IMS message queue configuration

Start your enterprise server region.
From the Enterprise Server Administration Home page, click the Details button in the Status column for your enterprise server region.
Click ES Monitor & Control.
On the sidebar menu under Resources, select IMS from the drop-down menu; then click the Control button below.
In the TM System Overview and Control section, modify the Message Queue Max and/or Cushion fields as required. See the IMS Control topic for a description of each.
When you have completed your changes, click Apply.
Changes take effect immediately.