DB2 Version 9.7 for Linux, UNIX, and Windows

int_rollbacks - Internal rollbacks monitor element

The total number of rollbacks initiated internally by the database manager.

Table 1. Table Function Monitoring Information
Table Function	Monitor Element Collection Level
MON_GET_CONNECTION table function - Get connection metrics	REQUEST METRICS BASE
MON_GET_CONNECTION_DETAILS table function - Get detailed connection metrics (reported in DETAILS XML document)	REQUEST METRICS BASE
MON_GET_SERVICE_SUBCLASS table function - Get service subclass metrics	REQUEST METRICS BASE
MON_GET_SERVICE_SUBCLASS_DETAILS table function - Get detailed service subclass metrics (reported in DETAILS XML document)	REQUEST METRICS BASE
MON_GET_UNIT_OF_WORK table function - Get unit of work metrics	REQUEST METRICS BASE
MON_GET_UNIT_OF_WORK_DETAILS table function - Get detailed unit of work metrics (reported in DETAILS XML document)	REQUEST METRICS BASE
MON_GET_WORKLOAD table function - Get workload metrics	REQUEST METRICS BASE
MON_GET_WORKLOAD_DETAILS table function - Get detailed workload metrics (reported in DETAILS XML document)	REQUEST METRICS BASE

Table 2. Snapshot Monitoring Information
Snapshot Level	Logical Data Grouping	Monitor Switch
Database	dbase	Basic
Application	appl	Basic

For snapshot monitoring, this counter can be reset.

Table 3. Event Monitoring Information
Event Type	Logical Data Grouping	Monitor Switch
Database	event_db	-
Connection	event_conn	-
Statistics	event_scstats (reported in the metrics document)	REQUEST METRICS BASE
Statistics	event_wlstats (reported in the metrics document)	REQUEST METRICS BASE
Unit of work	Reported in the in the system_metrics document.	REQUEST METRICS BASE
Statistics	event_scmetrics*	REQUEST METRICS BASE
Statistics	event_wlmetrics*	REQUEST METRICS BASE
* When returned as part of this logical data group, this element reflects the change in value of this metric since the last statistics collection or database activation, whichever was more recent.

Usage

An internal rollback occurs when any of the following cannot complete successfully:

A reorganization
An import
A bind or pre-compile
An application ends as a result of a deadlock situation or lock timeout situation
An application ends without executing an explicit commit or rollback statement (on Windows).

This value represents the number of these internal rollbacks since the later of:

The connection to the database (for database-level information, this is the time of the first connection)
The last reset of the database monitor counters.

While this value does not include explicit SQL ROLLBACK statements, the count from the int_deadlock_rollbacks monitor element is included.

You can use this element to calculate the total number of units of work by calculating the sum of the following:

 
   commit_sql_stmts
 + int_commits
 + rollback_sql_stmts
 + int_rollbacks

Note: The units of work calculated will include those since the later of:

The connection to the database (for database-level information, this is the time of the first connection)
The last reset of the database monitor counters.

This calculation can be done at the application or the database level.