10. Understanding ODBC Connectivity : ODBC Programming : ODBC CLI Connection Pooling : ODBC Connection Pool Timeout
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ODBC Connection Pool Timeout
ODBC pooled connections can be configured to time out to prevent an unmanageable number of connections in the pool.
By default, the Ingres ODBC CLI allows connections to remain in the pool as long as the ODBC application is active. You can override the default connection pool timeout value using the Ingres ODBC Administrator (iiodbcadmin) on UNIX, Linux, and VMS.
To change the connection pool timeout value on UNIX, Linux, and VMS
1. Start the Ingres ODBC Administrator by issuing the iiodbcadmin command.
2. At the utility menu, choose Drivers, Configuration Options.
The Configuration screen appears.
3. Enter a value in the edit box from 1 to 2,147,483,647, which represents the number of seconds that unused connections remain in the pool.
The default value is -1, which means that pooled connection objects never time out. When a connection object times out, it is disconnected from the database and deleted from the pool.
Note:  A thread in the ODBC CLI manages connection pool timeouts. If the time out value is left at -1, the thread is never started. For performance reasons, it is better to leave the timeout value at -1 rather than specifying a large value.