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How To Resize Redo Log File In Oracle 11G? The 77 New Answer

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Increase Redo Log Size

  • 1. Check Current Redo Logs SQL> column group# format 99999; SQL> column status format a10; SQL> column mb format 99999; …
  • 2. Add 3 Groups with New Size (1GB) …
  • 3. Switch Logfile to New Groups …
  • 4. Force a CheckPoint …
  • 5. Drop Group 1, 2, 3 …
  • 6. Remove Redo Log Files …
  • 7. Add Group 1, 2, 3 with New Size (1GB) …
  • 8. Switch Logfile Several Times …

How To Resize REDO Logs In Oracle Database.

How To Resize REDO Logs In Oracle Database.
How To Resize REDO Logs In Oracle Database.


There is no command to resize online redo logs in oracle as of now. So to achieve our goal of “How to Resize Online redo logs in oracle” we will do Drop and create online redo logs groups.SQL> alter database drop logfile group 1; SQL> alter database drop logfile group 2; SQL> alter database drop logfile group 3; Verify the groups were dropped, and the new groups’ sizes are correct.

To increase redo log size, we take the following steps to reach the goal.
  1. Check Current Redo Logs.
  2. Add 3 Groups with New Size (1GB)
  3. Switch Logfile to New Groups.
  4. Force a CheckPoint.
  5. Drop Group 1, 2, 3.
  6. Remove Redo Log Files.
  7. Add Group 1, 2, 3 with New Size (1GB)
  8. Switch Logfile Several Times.
Following are the steps to drop and create new standby database:
  1. Check Primary Redo Thread Number and size. …
  2. Check Standby Thread number and Size for Standby redo logs. …
  3. Stop the data-guard recovery process in Standby database: …
  4. Drop the existing Standby redo files: …
  5. Create new Standby logfile with THREAD Clauses.

Can we resize redo log file in Oracle?

There is no command to resize online redo logs in oracle as of now. So to achieve our goal of “How to Resize Online redo logs in oracle” we will do Drop and create online redo logs groups.

How do I resize a redo log in Oracle?

Use the following steps to update redo log size and files:
  1. Log in to the database node/VM (rp2vm2) as oracle user.
  2. Connect to sqlplus.
  3. Update redo log file size and increase groups using the steps captured below. …
  4. Switch the log file to the newly added redo log groups and delete the old inactive groups.

Can we resize redo logs?

But if redo logs are sized too small can cause Performance issues. In this case you need to resize the redo logs group.

What size should redo log be?

Redo log file size

Dell EMC recommends redo log group members sized between 512 MB to 2 GB for demanding OLTP systems. If the DBA is concerned that a larger redo log group will result in insufficient switching during non-peak period, the archive_lag_target parameter should be set to force periodic switching.

How do I resize a redo log in Oracle 12c RAC?

SQL> alter database drop logfile group 1; SQL> alter database drop logfile group 2; SQL> alter database drop logfile group 3; Verify the groups were dropped, and the new groups’ sizes are correct.

How do I resize a standby redo log?

Following are the steps to drop and create new standby database:
  1. Check Primary Redo Thread Number and size. …
  2. Check Standby Thread number and Size for Standby redo logs. …
  3. Stop the data-guard recovery process in Standby database: …
  4. Drop the existing Standby redo files: …
  5. Create new Standby logfile with THREAD Clauses.

How do I resize a redo log in standby database?

Following are the steps to drop and create new standby database:
  1. Check Primary Redo Thread Number and size. …
  2. Check Standby Thread number and Size for Standby redo logs. …
  3. Stop the data-guard recovery process in Standby database: …
  4. Drop the existing Standby redo files: …
  5. Create new Standby logfile with THREAD Clauses.

How do I change the size of my redo log?

To increase redo log size, we take the following steps to reach the goal.
  1. Check Current Redo Logs.
  2. Add 3 Groups with New Size (1GB)
  3. Switch Logfile to New Groups.
  4. Force a CheckPoint.
  5. Drop Group 1, 2, 3.
  6. Remove Redo Log Files.
  7. Add Group 1, 2, 3 with New Size (1GB)
  8. Switch Logfile Several Times.

Can we resize redo log file?

SQL> alter database drop logfile group 1; SQL> alter database drop logfile group 2; SQL> alter database drop logfile group 3; Verify the groups were dropped, and the new groups’ sizes are correct.

How do you increase the size of the archive redo log directory?

Use the following steps to update redo log size and files:
  1. Log in to the database node/VM (rp2vm2) as oracle user.
  2. Connect to sqlplus.
  3. Update redo log file size and increase groups using the steps captured below. …
  4. Switch the log file to the newly added redo log groups and delete the old inactive groups.

How do I resize a redo log in Oracle 11g RAC?

SQL> alter database drop logfile group 1; SQL> alter database drop logfile group 2; SQL> alter database drop logfile group 3; Verify the groups were dropped, and the new groups’ sizes are correct.

How do I increase the redo log size in RAC?

3- Let’s create 3 new log groups per instance and name them groups 40,41,42 and 50,51 and 52 and each 500MB in size: SQL> ALTER DATABASE ADD LOGFILE THREAD 1 GROUP 40 ‘+DATA’ SIZE 500m; Database altered. SQL> ALTER DATABASE ADD LOGFILE THREAD 1 GROUP 41 ‘+DATA’ SIZE 500m; Database altered.

How do I resize a redo log in Oracle 11g?

To increase redo log size, we take the following steps to reach the goal.
  1. Check Current Redo Logs.
  2. Add 3 Groups with New Size (1GB)
  3. Switch Logfile to New Groups.
  4. Force a CheckPoint.
  5. Drop Group 1, 2, 3.
  6. Remove Redo Log Files.
  7. Add Group 1, 2, 3 with New Size (1GB)
  8. Switch Logfile Several Times.

Can we resize redo log file in Oracle?

There is no command to resize online redo logs in oracle as of now. So to achieve our goal of “How to Resize Online redo logs in oracle” we will do Drop and create online redo logs groups.

Can we resize redo log file?

SQL> alter database drop logfile group 1; SQL> alter database drop logfile group 2; SQL> alter database drop logfile group 3; Verify the groups were dropped, and the new groups’ sizes are correct.

How do I reduce the redo log in Oracle?

SQL> alter database drop logfile group 1; SQL> alter database drop logfile group 2; SQL> alter database drop logfile group 3; Verify the groups were dropped, and the new groups’ sizes are correct.

How do I change the redo log size in Oracle?

Use the following steps to update redo log size and files:
  1. Log in to the database node/VM (rp2vm2) as oracle user.
  2. Connect to sqlplus.
  3. Update redo log file size and increase groups using the steps captured below. …
  4. Switch the log file to the newly added redo log groups and delete the old inactive groups.

How do I resize a redo log?

To increase redo log size, we take the following steps to reach the goal.
  1. Check Current Redo Logs.
  2. Add 3 Groups with New Size (1GB)
  3. Switch Logfile to New Groups.
  4. Force a CheckPoint.
  5. Drop Group 1, 2, 3.
  6. Remove Redo Log Files.
  7. Add Group 1, 2, 3 with New Size (1GB)
  8. Switch Logfile Several Times.

How do I drop a redo log in Oracle?

To drop specific inactive redo log members, use the ALTER DATABASE statement with the DROP LOGFILE MEMBER clause. The following statement drops the redo log /oracle/dbs/log3c. rdo : ALTER DATABASE DROP LOGFILE MEMBER ‘/oracle/dbs/log3c.

How do you drop a redo log thread?

Steps to drop redo log groups
  1. While dropping redo log group & we need to check the status of redo log groups. redo log group status should be INACTIVE or UNUSED. …
  2. To drop inactive/unused redo log group: SQL> Alter database drop logfile group 1; Database altered.
  3. Check again to verify the redo log groups:

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