IBM Books

Internal Rollbacks Due To Deadlock


Snapshot Information Level
Database
Application

API Structure(s)
sqlm_dbase
sqlm_appl

Monitor Group
Basic
Basic

Resettable

Yes

 

Event Information Level
Connection

API Structure(s)
sqlm_conn_event

 

API Element Name
Element Type

int_deadlock_rollbacks
counter

 

Description:  The total number of forced rollbacks initiated by the database manager due to a deadlock. A rollback is performed on the current unit of work in an application selected by the database manager to resolve the deadlock.

Usage:  This element shows the number of deadlocks that have been broken and can be used as an indicator of concurrency problems. It is important, since internal rollbacks due to deadlocks lower the throughput of the database.

This value is included in the value given by "Internal Rollbacks".

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