You can display information on the size and current usage of the log area in the Database Manager GUI.
Select the required database instance in the list of database instances. Choose Instance ® Information ® Log Area.
The display is divided into the following areas:
· Volumes: Information about the log volumes
· Settings: Information about the log settings, values of the database parameters MAXLOGVOLUMES and LOG_SEGMENT_SIZE
· Usage: Usage of the log area
· I/O: Reads and writes for each log volume
Among other things, you see the following information for each log volume: name, size, type, and path in the run directory.
You can control redo log management by making various log settings. The following settings are displayed:
·
Log Mode: See Log Mode
SINGLE: The log volumes are not mirrored.
MIRRORED: The log volumes are mirrored.
·
Overwrite Mode: See Overwrite Mode for the
Log Area
NORMAL: The log area cannot be overwritten until the log entries have been
backed up.
OVERWRITE: The log area is overwritten when it is full.
·
Redo Log Management: See Activating or
Deactivating Redo Log Management
ACTIVATED: Redo log management is activated.
DEACTIVATED: Redo log management is deactivated.
See also:
The maximum number of data volumes is controlled by the general database parameter MAXDATAVOLUMES. The general database parameter LOG_SEGMENT_SIZE controls the size of segment that is chosen when log backups are made. The current values of these database parameters are displayed.
If the database instance is in the ONLINE operational state, you can display the usage of the log area.
Total Size |
Total size of the log area |
Free Log Area |
Free log area |
Used Log Area |
Used log area |
Unsaved Log Area |
Size of the log area that has not yet been backed up |
Log since last data backup |
Log entries written since the last data backup |
If the database instance is in the ONLINE operational state, you can display the read and write activities for each log volume.