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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Distributed data
Multiphase commit protocols
Independent actions
The heuristic rollback scenario
Conditions that result in a heuristic rollback

Conditions that result in a heuristic rollback

The following two conditions can cause a heuristic rollback:

The logical log fills to the point defined by the LTXEHWM configuration parameter. (See the topics about configuration parameters in the HCL OneDB™ Administrator's Reference.) The source of the long-transaction condition is a piece of work being performed on behalf of a global transaction.
An administrator executes onmode -z session_id to stop a database server thread that is executing a piece of work being performed on behalf of a global transaction.

In either case, if the piece of work has already sent a can commit message to its coordinator, the action is considered a heuristic decision.