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Uniform distributed topics - configure thresholds and quotas

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After you create a uniform distributed topic, you can change the default upper and lower byte and message thresholds for the distributed topic members. Exceeding these thresholds will which trigger events such as generating log messages and starting message flow control. You can also select a pre-configured quota, which specifies the maximum number of bytes or messages that the distributed topic is allowed to store to conserver memory use. You can also specify a maximum size allowed for messages on the distributed topic.

To configure thresholds and quotas for a distributed topic:

  1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
  2. In the Administration Console, navigate to the uniform distributed topic resource that you want to configure:
  3. Select Configuration > Thresholds and Quotas.
  4. To define thresholds for this distributed topic:
    1. In Bytes Threshold High or Messages Threshold High, specify an upper threshold value that will trigger events based on the number of bytes or messages stored in the members of this distributed topic. Events include message flow control and system log messages.
    2. In Bytes Threshold Low or Messages Threshold Low, specify a lower threshold value that will trigger events based on the number of bytes or messages stored in the members of this distributed topic. Events include message flow control and system log messages.

    For more information about these fields, see Configuration Options.

  5. To define quotas for this distributed topic:
    1. In Quota, select a configured quota settings for the members of this distributed topic.
    2. In Maximum Message Size, specify the maximum size of a message that will be accepted from message producers on the members of this distributed topic. The size includes the message body, any user-defined properties, and the user-defined JMS header fields, JMSCorrelationID and JMSType.
    3. In Topic Subscription Messages Limit, specify the maximum number of messages that can be stored in a topic subscription before its earliest messages are deleted to make room for new messages.

    For more information about these fields, seeConfiguration Options.

  6. Save your changes:
  7. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
    Not all changes take effect immediately—some require a restart (see Use the Change Center).

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