Use this task to configure the throttling of messages for message-driven beans that you have deployed as JCA 1.5 resources on the default messaging provider.
Use this task if you want to throttle messages for a message-driven bean deployed as a J2EE Connector Architecture (JCA) 1.5 resource on the default messaging JMS provider.
The default messaging provider (the SIB JMS Resource Adapter) uses a special type of message throttling. You should use the throttling support described in this topic instead of the JCA 1.5 throttling of messages described in Throttling of inbound message flow for JCA 1.5 message-driven beans. You can leave the message-driven bean pools to the default size of 500.
The default messaging provider enables the throttling of message delivery to a message-driven bean through a configuration option on the JMS activation specification used to deploy the bean. This configuration option is labelled Maximum concurrent endpoints and can be found on the JMS activation specification panels in the administrative console.
The Maximum concurrent endpoints field limits the number of endpoints (instances of a given message-driven bean) that process messages concurrently. If the maximum has been reached, new messages are not accepted from the messaging engine for delivery until an endpoint finishes its current processing.
If the available message count (queue depth) associated with a message-driven bean is frequently high, and if your server can handle more concurrent work, you can benefit from increasing the maximum concurrency setting.
If you set the maximum concurrency for a message-driven bean, be sure that you specify a value smaller than the maximum number of endpoint instances that can be created by the adapter that the message-driven bean is bound to. If necessary, increase the endpoint instance limit.
To configure the message throttling support of the default messaging provider (the SIB JMS Resource Adapter), use the administrative console to complete the following steps.
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