Oracle International Corporation

Yujie Cao

Susan M Kotsovolos

Geeta Arora

Harmeek Singh Bedi

Rajendra Pingte

Chao Liang

David Kogan

Tugrul Bingol

Techniques for migrating duration trees from a source database server (or instance) to a destination database server (or instance) are provided. A duration is a memory management construct that allows database components to group related areas of memory together. A source duration tree is captured at the source database server and combined with a destination duration tree at the destination database server. Any duration identifiers in the source duration tree that conflict with (i.e., are the same as) a duration identifier in the destination duration tree are mapped to new duration identifiers.

Replication and mapping mechanism for recreating memory durations

A technique for migrating (e.g., 'copying' or 'moving') temporary data from one session to another session is provided. While executing a workload associated with a particular session, session state is created. A subset of the session state comprises large objects that are referred to as &#x201c;temporary data.&#x201d; Thus, temporary data is stored in a database (instead of in the database server) and is normally deleted when the particular session is deleted. To avoid this deletion when the session state is migrated to a different session, the temporary data, in one embodiment, is saved in an external storage that is separate from the database. An external table is created in the external storage and stores the temporary data. Location information to access the external table is provided to the other session.

Migrating temporary data of a session

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Redwood Shores, CA, United States of America

Yujie Cao