Appendix : Administration : Business Analytics Repositories : Tuning the Business Analytics Repository Connection Pool
Tuning the Business Analytics Repository Connection Pool
In addition to basic connection configuration, you can configure the connection pools for the Business Analytics Repository. In many cases, you need to tune this configuration to optimize your Business Analytics environments.
Note:  
For a complete list of connection properties, see TomEE Datasource Properties.
To tune the connection pool, you update properties in the <Resource> element for the Business Analytics repository in the MashZoneNG-install/apache-tomee-jaxrs/conf/tomee.xml file and then restart Business Analytics to apply these changes.
Connection Pool Size Properties
initialSize
The initial number of connections to create when the pool starts up. This defaults to 0.
maxActive
The maximum number of connections that can be allocated at one time. This defaults to 20. Set this to -1 to remove all limits.
maxWaitTime
The maximum number of milliseconds that the pool will wait when no connections are available before failing. Defaults to -1 which is an indefinite wait.
Idle Pool Connection Properties
maxIdle
The maximum number of connections that can be idle without connections being released. Defaults to 20. Set this to -1 to prevent any connections being released.
minIdle
The minimum number of idle connections that can exist before new connections are added to the pool. This defaults to 0, indicating no new connections should be created.
testWhileIdle
Whether connections should be tested when idle.
If this is enabled, idle connections are tested using the Validation query.
timeBetweenEvictionRuns
The number of milliseconds between tests of idle connections. This defaults to -1, which prevents all idle connection testing.
numTestsPerEvictionRun
The number of connections to test during any idle connection test run.
minEvictableIdleTime
The minimum number of milliseconds that a connection can be idle before being tested for eviction. Default is 3 minutes.
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