50.2 DataSource metrics

The following metrics are exposed for each supported DataSource defined in your application:

• The number of active connections (datasource.xxx.active)
• The current usage of the connection pool (datasource.xxx.usage).

All data source metrics share the datasource. prefix. The prefix is further qualified for each data source:

• If the data source is the primary data source (that is either the only available data source or the one flagged @Primary amongst the existing ones), the prefix is datasource.primary.
• If the data source bean name ends with DataSource, the prefix is the name of the bean without DataSource (i.e. datasource.batch for batchDataSource).
• In all other cases, the name of the bean is used.

It is possible to override part or all of those defaults by registering a bean with a customized version of DataSourcePublicMetrics. By default, Spring Boot provides metadata for all supported data sources; you can add additional DataSourcePoolMetadataProvider beans if your favorite data source isn’t supported out of the box. See DataSourcePoolMetadataProvidersConfiguration for examples.