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4.3.5 Java Message Service connection pool sizes
You can access the JMS connection factories and JMS queue connection factories from the
administrative console in several ways:
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Click Resources Resource Adapters J2C connection factories and select the
factory name.
Click Resources JMS Connection factories and select the factory name.
Click Resources JMS Queue connection factories and select the factory name.
Click Resources Resource Adapters Resource adapters and select the resource
adapter name (for example, SIB JMS Resource Adapter). Then click Additional
priorities J2C connection factories and select the factory name.
From the connection factory admin panel, click Additional Properties Connection
pool properties. Set the Maximum connections property for the maximum size of the
connection pool.
4.3.6 Java Database Connectivity data source parameters
Data sources can be accessed through either of these paths:
► Click Resources JDBC Data sources and select the data source name.
► Click Resources JDBC Providers and select the Java Database Connectivity (JDBC)
provider name, followed by clicking Additional Properties Data sources and selecting
the data source name.
Connection pool size
The maximum size of the data source connection pool is limited by the value of the Maximum
connections property, which can be configured by clicking the Additional Properties
Connection pool properties in the data source window.
Increase the maximum number of connections in the data pool to greater than or equal to the
sum of all maximum thread pool sizes.
The following data sources typically must be tuned:
► Business Process Choreographer (BPC) data sources for the BPEDB and associated
message engine database (for BPEL business processes)
► BPMN data sources for the BPMN databases and associated message engine databases
(for BPMN business processes)
► SCA application bus messaging engine data source
► SCA system bus messaging engine data source
► Common Event Infrastructure (CEI) bus messaging engine data source
Prepared statement cache size
You can configure the cache size of the data source prepared statement from the data
source. Click Additional properties WebSphere Application Server data source
properties.
For BPEL business processes, ensure that each data source’s prepared statement cache is
sufficiently large. For example, set the BPEDB data source prepared statement cache size to
at least 300.
Chapter 4. Performance tuning and configuration 55