How to shrink the transaction log in SQL Server?

How to shrink the transaction log in SQL Server?

Shrink the log in SQL Server Management Studio. To shrink the log in SSMS, right click the database, choose Tasks, Shrink, Files: On the Shrink File window, change the File Type to Log.

Is the SQL log file shrinking in AlwaysOn group?

TLog backup is being taken for all user-Databases in every hour only on primary node as mentioned in my post. So far TLog physical file-size was small, wouldn’t increase and most of the time had more than 90% available free space – which is what its supposed to be.

When to use AlwaysOn availability in SQL Server?

We are using AlwaysOn Availability Group feature of SQL Server 2012. Regular full database backups and transaction log backups are done every day on the secondary database. I have read here doing the transaction log backup on either the primary replica or the secondary replica will mark both replicas’ transaction logs as reusable.

Do you need to increase transaction log size?

Here is a typical scenario every SQL Server DBA faces: Transaction Log grows unexpectedly or becomes full!! So, do I need to increase the Log size? Fortunately we have a better solution – SHRINK the log file!

How big is a lop Shrink Log File?

At a log file size of about 20GB each shrink attempt generated a few hundred MB of new log. I repeated the shrink operation a few times and received the same result each time. Reading out the log I found that all of that space was for LOP_SHRINK_NOOP log records.

How are transaction log files created in a database?

Now the database’s transaction log file is not just one continuous storage container, but a collection of Virtual Log Files (VLFs) which are created in a sequential order inside the Transaction Log (TLog) file.

Is it OK to shrink the tlog file size?

You might observe that the used space inside the TLog file might only be 1% of the available TLog file size. The general recommendation is not to shrink the TLog file, because it grew for a certain reason and will possibly grow again to the size it once was. But that is a story for another post.

How to reduce the size of a transaction log file?

For information, see Factors that can delay log truncation. Shrinking a log file removes one or more VLFs that hold no part of the logical log (that is, inactive VLFs). When a transaction log file is shrunk, inactive VLFs are removed from the end of the log file to reduce the log to approximately the target size.

Is there a way to shrink the log file?

It seems there’s no any open user transaction. 1 or more of your subscribers is not taking transactions. You will not be able to shrink the log file until you resolve the issue. The simplest solution is to look at Replication Monitor and see the cause. PS. No is it not replicating properly to one or more subscribers.

Why is my DBCC log file not shrinking?

DBCC LOGINFO shows all my VLFs in use. Based on the result of Log_reuse_wait_desc and DBCC OPENTRAN, undistributed transaction causes the Log Growth. According to your description ‘ This value is not changing since many hours now ‘, I think the replication did not work effectively.

When to truncate SQL Server transaction log file?

If no Transaction Log backup is taken from the database, the Transaction Log file will grow continuously, without truncation, until it runs out of free space. The SQL Server Transaction Log backup can be taken only from the database when the recovery model of that database is Full or Bulk-Logged.

Why is my transaction log full due to replication?

Today, I got an alert saying that my replication ServerA.DBA (pub) –> ServerB.DBB (Sub) is failing with below error: Replication-Replication Distribution Subsystem: agent failed. The transaction log for database is full due to ‘REPLICATION’.

Can a mirror shrink a physical log file?

This theory is further backed up by the fact once I remove the mirroring, the DBCC SHRINKFILE command correctly shrinks the physical log file, and the log_reuse_wait_desc is back to waiting on LOG_BACKUP I can’t shrink the log file on the mirrored server because it’s acting as a mirror and can’t be opened, so I think the mirror is unrecoverable.

How to reduce the size of the tempdb transaction log?

Restarting a server instance resizes the transaction log of the tempdb database to its original, pre-autogrow size. This can reduce the performance of the tempdb transaction log. You can avoid this overhead by increasing the size of the tempdb transaction log after starting or restarting the server instance.

How does log shipping work with transactional replication?

Log Shipping with Transactional Replication. For transactional replication, the behavior of log shipping depends on the sync with backup option. This option can be set on the publication database and distribution database; in log shipping for the Publisher, only the setting on the publication database is relevant.

How to sync with replication in SQL Server?

If the sync with backup option is not set on the publication database, execute sp_replicationdboption ‘ ‘, ‘sync with backup’, ‘true’. For more information, see sp_replicationdboption (Transact-SQL). Configure log shipping for the publication database. For more information, see Configure Log Shipping (SQL Server).