Measures reported by TibUnUsgTest
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.
Outputs of the test : One set of results for each database server being monitored.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Total_size |
Indicates the total size of the UNDO tablespace. |
MB |
|
| Used_size |
Indicates the used size of the UNDO tablespace. |
MB |
|
| Free_size |
Indicates the free size of the UNDO tablespace. |
MB |
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. |
Percent |
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. |
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