Tibero Undo Usage Test

This test periodically monitors the space usage of the UNDO tablespace, and proactively alerts administrators to excessive space consumption by, or deficiencies in space allocations to, the UNDO tablespace.

Target of the test : A Tibero Database server

Agent deploying the test :An internal agent

Outputs of the test : One set of results for the target Tibero Database server being monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.


The host for which the test is to be configured.


The port to which the specified host listens. By default, the port number is 8629.

User and Password

In order to monitor a Tibero database server, a special database user account has to be created in every Tibero database instance that requires monitoring. A Click here hyperlink is available in the test configuration page, using which a new Tibero database user can be created. Alternatively, you can manually create the special database user. When doing so, ensure that this user is vested with the select any dictionary and create session privileges.

The sample script we recommend for user creation for eG monitoring is:

create user tibeg identified by tibeg default tablespace <users> temporary tablespace<temp>;

grant create session, select any dictionary tibeg;

The name of this user has to be specified in the User text box, and the password of this user has to be entered in the Password text box. This login information is required to query Tibero's internal dynamic views, so as to fetch the current status / health of the various database components.

Confirm Password

Confirm the Password by retyping it here.

Tibero SID

Specify the SID of the target Tibero database instance that is to be monitored in this text box.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Total size

Indicates the total size of the UNDO tablespace.



Used size

Indicates the used size of the UNDO tablespace.



Free size

Indicates the free size of the UNDO tablespace.


Ideally, the value of this measurement should be very high.

Free percent

Indicates the percentage of space allocated to the UNDO tablespace, which is still unused.


Typically, a high percentage of free space is desired. A value close to 0 or a consistent decrease in the value of this measure could indicate excessive space consumption by the UNDO tablespace or insufficient space allocation; lack of free space for the UNDO tablespace can severely affect database performance, and can even cause the database to hang! To avoid such adversities, you might want to consider allocating more space to the UNDO tablespace.