JMS quotas are used to control the allotment of system resources available to destinations. For example, you can specify the number of bytes or messages that a destination is allowed to store, or specify whether the quota can be shared be all destinations that refer to it.
Once you configure a quota, you can select it on the Thresholds and Quota page from within a destination resource, such as a queue, topic, distributed queue, distributed topic, or JMS template if you are using templates to configure your destinations.
For more information about these fields see Configuration Options.