Messages queue
Checking Maximum Available Memory and are not available.
enables the keyed message mode for this thread. By default, the check box is unselected, and- Maximum Available Memory is used to set the maximum memory that is used for "in memory messages" in the thread at runtime. The memory range is 1 to 500 MB. If the text box value is empty, then the default memory of 150 MB is used.
- specifies what happens if a message without a key arrives in this thread. By default, the check box is unselected and the arrival of messages without keys is considered an error.