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Measures reported by OraDgLogStatusTest
Oracle Database lets you save filled groups of redo log files to one or more offline destinations, known collectively as the archived redo log, or more simply the archive log. The process of turning redo log files into archived redo log files is called archiving. Data Guard manages the transmission of redo data using the Redo transport services.
Redo transport services control the automated transfer of redo data from the production database to one or more archival destinations.
Redo transport services perform the following tasks:
Transmit redo data from the primary system to the standby systems in the configuration Manage the process of resolving any gaps in the archived redo log files due to a network failure Enforce the database protection modes Automatically detect missing or corrupted archived redo log files on a standby system and automatically retrieve replacement archived redo log files from the primary database or another standby database.
There are several types of destinations supported by redo transport services. They are:
Oracle Data Guard standby databases Archived redo log repository Oracle Streams real-time downstream capture database Oracle Change Data Capture staging database
If the destination at which the redo logs have to be archived is not available, then there would be a considerable difference in the data stored between the production database and the standby databases. To avoid such indifferences and maintain proper synchronization of data, it is essential to monitor the status of the destination at which the log files are archived constantly. The OraDgLogStatusTest test helps administrators in this regard!
For each destination at which the redo logs are to be archived, this test reports the current status of the destination and the current applied mode of the destination.
Outputs of the test : One set of results for each destination to which the redo log files are to be archived from the target Oracle Database server being monitored.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Status |
Indicates the current status of this archived redo log destination. |
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The values reported by this measure and its numeric equivalents are mentioned in the table below:
| Measure Value |
Numeric Value |
| Valid |
0 |
| Alternate |
1 |
| Diferred |
2 |
| Full |
3 |
| Error |
4 |
| Disabled |
5 |
| Bad param |
6 |
Note:
By default, this measure reports the current status of each archived redo log destination. The graph of this measure however, is represented using the numeric equivalents only - 0 to 5. |
| Recovery_mode |
Indicates the current applied mode on this archived redo log destination. |
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The values reported by this measure and its numeric equivalents are mentioned in the table below:
| Measure Value |
Numeric Value |
| Managed |
0 |
| Managed real time apply |
1 |
| Logical standby |
2 |
| Logical real time apply |
3 |
| Logical apply |
3 |
| Idle |
4 |
Note:
By default, this measure reports the current applied mode of the archived redo log destination. The graph of this measure however, is represented using the numeric equivalents only - 0 to 4. |
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