The Dbvisit Standby database repository (DDR) can be queried to obtain information about the standby database process. There are three methods to report on the information contained in the DDR:
Example:
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The DDR is a small repository and should not take more than about 10MB in space. The DDR is not automatically archived and may grow over time. An archiving process can be setup to remove old entries.
The repository contains the following tables which may be queried (or archived):
dbv_transfer_log | Used by Dbvisit Standby to maintain list of archive logs that have been sent to standby database. |
dbv_sequence_log | Used by Dbvisit Standby to record the log sequences at specific times. |
Do not update any entries or modify the structure of these tables.
The web-based version of Dbvisit Standby provides extensive reporting on the transfer and log gap reporting. Full online help is available for each graph. The following graphs are available:
1. Archive log transfer time which displays the transfer time in seconds over time.
2. Archive log gaps, which displays the archive log gap and transfer log gap.
3. Compression ratio if the archive log files are compressed.
4. Transfer log size which displays the size of the transferred log files over time.
5. Daily redo size over time.
6. Daily archive log transfers which displays the number of archive transferred each day.
7. Standby Database Sync Status Report shows fine grained detail on the differences between the primary and the standby database. The report includes current SCNs of primary and standby databases with time, and which SCN and sequence is required by standby database for recovery.
1. The following query will report on the duration of the transfer and compress steps each time Dbvisit Standby has executed. The result of this query may be graphed and used for trend analysis:
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2. The following query will report on the archive log gap over time. Note that the archive log gap information is only saved if the dbvisit -icommand (inspect) is scheduled on a regular basis:
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