Changes in This Release for Oracle Database Net Services Reference

This preface contains:

Changes in Oracle Net Services 19c Release

The following are the changes in Oracle Database Net Services Reference for Oracle Database Release 19c.

New Features

Review new features available with Oracle Database 19c.


The COLOCATION_TAG parameter is an alphanumeric string that you can use with the CONNECT_DATA parameter of the TNS connect string. When you set the COLOCATION_TAG parameter, it attempts to route clients with the same COLOCATION_TAG to the same database instance.

Colocation of sessions on the same instance can help decrease inter-instance communication and thereby increase performance for workload that benefits from being executed in the same instance.

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