How do I reduce the redo log in Oracle?
- Log in to the database node/VM (rp2vm2) as oracle user.
- Connect to sqlplus.
- Update redo log file size and increase groups using the steps captured below.
- Switch the log file to the newly added redo log groups and delete the old inactive groups.
How do I change the redo log location in Oracle 11g?
You can use operating system commands to relocate redo logs, then use the ALTER DATABASE statement to make their new names (locations) known to the database….
- Shut down the database.
- Copy the redo log files to the new location.
- Startup the database, mount, but do not open it.
- Rename the redo log members.
How do you Multiplex redo log files?
To multiplex your redo log, you must add members to each redo log group. It is not required that redo log groups be symmetrical, but Oracle recommends that your groups all have the same number of members. A database must have a minimum of two redo log groups.
How do you increase the size of the Oracle redo logs?
To increase redo log size from 50MB to 1GB, we take the following steps to reach the goal.
- Check Current Redo Logs.
- Add 3 Groups with New Size (1GB)
- Switch Logfile to New Groups.
- Force a CheckPoint.
- Drop Group 1, 2, 3.
- Remove Redo Log Files.
- Add Group 1, 2, 3 with New Size (1GB)
- Switch Logfile Several Times.
How do I know the size of my redo log?
You can view the redo_buffer_allocation_retries in V$SYSSTAT to see if your redo log files are too small. There are two ways to see the frequency of log switches, the v$loghist view and looking at the Oracle alert.
What is the minimum size permitted for a redo log file?
The minimum size permitted for a redo log file is 4 MB. See Also: Your operating system–specific Oracle documentation. The default size of redo log files is operating system dependent.
What is difference between archive and redo log?
Archive logs are archived redo(online) log files. In redo log files are all changes that happened to your data. If your database is in archivelog mode, than redo logs can’t be overwritten, they are archived in some other location when they are full. Redo and archive logs are used in various database recovery scenarios.