WebSphere Message Brokers
File: aq20060_
Writer: Terry Cowling

Concept topic

This build: July 31, 2007 21:35:52

Performance considerations for Real-time transport

A broker that is configured to use Real-time transport has several properties that can be changed to affect the behavior of the broker. These properties are:
brokerInputQueues
This property defines how many queues are available to store incoming messages; the higher the number of queues, the higher the potential rate of accepting incoming messages by the broker.

The default value is 1.

brokerInputQueueLength
This property defines the maximum number of messages that can be stored in each input queue; the higher the value, the higher the number of input messages that can be stored in each input queue; however, be aware that the higher the value of this property, the larger the amount of memory that the broker requires for each queue.

The default value is 99.

maxBrokerQueueSize
This property defines the maximum size of the broker's output queues. If this maximum is exceeded, the broker deletes all messages queued to that broker, except the latest message, any high-priority messages, and any response messages. If this property is set to 0, the broker does not impose any limit on the number of bytes that can be queued to another broker.

The default value is 1000000 bytes.

brokerPingInterval
This property defines the time in milliseconds between broker-initiated ping messages on broker-broker connections. Ping messages are used to confirm that communications are still open between both sides of the connection. If the value is 0, no ping messages are sent by the broker.

The default value is 5000 milliseconds.

maxMessageSize
This property defines the maximum size of message that can be received by the broker. If the broker receives a message that is bigger than this, the broker disconnects the client that sent the message.

The default value is 100000 bytes.

Use the mqsichangeproperties command to define new values for these properties if you don't want to use the default values.

Related tasks
Generating statistics reports
Subscribing to statistics reports
Related reference
mqsichangeproperties command
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Copyright IBM Corporation 1999, 2007Copyright IBM Corporation 1999, 2007. All Rights Reserved.
This build: July 31, 2007 21:35:52

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