Table of Contents

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  1. Preface
  2. Analyst Service
  3. Content Management Service
  4. Data Integration Service
  5. Data Integration Service Architecture
  6. Data Integration Service Management
  7. Data Integration Service Grid
  8. Data Integration Service Applications
  9. Metadata Manager Service
  10. Model Repository Service
  11. PowerCenter Integration Service
  12. PowerCenter Integration Service Architecture
  13. High Availability for the PowerCenter Integration Service
  14. PowerCenter Repository Service
  15. PowerCenter Repository Management
  16. PowerExchange Listener Service
  17. PowerExchange Logger Service
  18. SAP BW Service
  19. Search Service
  20. System Services
  21. Test Data Manager Service
  22. Test Data Warehouse Service
  23. Web Services Hub
  24. Application Service Upgrade
  25. Application Service Databases
  26. Connecting to Databases from Windows
  27. Connecting to Databases from UNIX
  28. Updating the DynamicSections Parameter of a DB2 Database

Maintain Connection Pools

Maintain Connection Pools

Connection pooling is a framework to cache database connection information that is used by the Data Integration Service. Connection pools increase performance through the reuse of cached connection information.
A connection pool is a group of connection instances for one connection object. A connection instance is a representation of a physical connection to a data source. A connection pool library can contain multiple connection pools. The number of connection pools depends on the number of unique connections that the DTM instances use while running jobs.
You configure the Data Integration Service to run DTM instances in the Data Integration Service process or in separate DTM processes that run on local or remote nodes. Each Data Integration Service process or DTM process maintains its own connection pool library that all DTM instances running in the process can use. The number of connection pool libraries depends on the number of running Data Integration Service processes or DTM processes.
A connection instance can be active or idle. An active connection instance is a connection instance that a DTM instance is using to connect to a database. A DTM process or the Data Integration Service process can create an unlimited number of active connection instances.
An idle connection instance is a connection instance in a connection pool that is not in use. A connection pool retains idle connection instances based on the pooling properties that you configure for a database connection. You configure the minimum connections, the maximum connections, and the maximum idle connection time.