Summary: This blog post explains the reasons responsible for SQL Server database stuck in the recovery. It also considers corruption to be the major reason behind the cause or database may lead to suspect mode due to which it becomes unreadable. The procedure to bring SQL database to a consistent mode is also defined.
The main responsibility of the Database Administrator is to keep the server functionality optimal at all times. Even if you are well adept with the SQL processes and functions, there are several situations where you feel that the performance is dragging down and the database requires recovery. If in case the SQL Server database is stuck in recovery, then corruption may be the cause. Under such situations, you will not be allowed to execute any operation on the database as it goes into the Offline/ Suspect mode.
What Cause SQL Server Stuck in Recovery?
This is perhaps the first question that strikes through the mind of a Database Administrator. In this situation, examining the transactional log files may help determine the actual reason behind the cause. Some of the common reasons behind the occurrence of this situation are:
- Missing Log Files: Any of the log files may have been deleted accidentally due to which the database is stuck in Recovery. Restoring the missing log file to its actual location may prove to be helpful. The name and path of the deleted or missing file can be known by analyzing the SQL Server Error Log.
- Corruption in DB/ Log: The corrupt transaction may turn the database Suspect. If this is the reason, the entire data stored in the SQL database objects is at stake. Abrupt shutdown or inappropriately exiting the application makes the running logs corrupt, thus leading to inaccessibility of associated components.
- Insufficient Storage Space: Another major reason behind the cause could be the absence of storage space on storage media. While performing the recovery operation, it is vital that some additional empty space must be available on media. In the lack of space on the storage drive, the database turns corrupt or becomes inaccessible.
How to Bring SQL Database to the Functional State?
Follow the steps below to bring the SQL Database to the consistent mode from its unresponsive Suspect state:
- Reset Status of the Database
Navigate to MSSQL/ Install directory and try to execute Instsupl.sql script. This will lead to the creation of Stored Procedure- sp_resetstatus which can further be used for resetting the status of the inconsistent database.
- Set Database as Emergency
Under such circumstances, when the database is in the Suspect mode, you will need to change the status of the database to the EMERGENCY mode. This will provide read-only access to the database. To bring the database to the EMERGENCY state, follow the given syntax:
“ALTER DATABASE Database Name SET EMERGENCY”
- Check for Inconsistencies
Run DBCC CHECKDB to check the physical and logical inconsistencies in the database. If any of the inconsistencies are found in the database or any of its objects, try executing the following repair:
- Backup the Database
To ensure safety over database components, backup is recommended.
- Run REPAIR_ALLOW_DATA_LOSS
Now, run REPAIR_ALLOW_DATA_LOSS. Note that once the database is repaired using this query, the actions being performed cannot be undone. This is why it is recommended to backup the database before running the repair option.
- Bring Database to MULTI_USER mode
To bring the database to MULTI_USER mode, execute the following command:
“ALTER DATABASE Database Name SET MULTI_USER”
Note: If at this stage, any of the inconsistencies or error messages appears, immediately bring the database to the single user mode by applying the following command.
“ALTER DATABASE Database Name SET SINGLE_USER WITH ROLLBACK IMMEDIATE;”
Then, refresh the SQL Server Database and verify the connectivity to ensure smooth functionality of the business processes.
Since the main reason behind the SQL Server database stuck in Recovery is corruption or when the database is in the Suspect mode, therefore, it is recommended that SQL Database Administrators must execute Database Console Commands regularly to check the logical and physical inconsistencies. This will prevent the database to fall into the inconsistent state.
Alternate Solution to Repair SQL Database – Stellar Phoenix SQL Database Repair
As an alternate solution, it is recommended to deploy Stellar Phoenix SQL Database Repair utility in your premises to minimize the risk of data loss. The software will repair the entire database and its incorporated objects automatically and assists DBAs in bringing the database to its consistent state. No technical expertise is required to perform SQL repair procedure using the tool.
The professional software is a comprehensive solution that helps repair the database from all downtime situations. The utility integrates advanced scanning algorithms that scan the database file to retrieve all incorporated data. After the scan completes, you can select to repair selected database objects by clicking the associated checkboxes. This way, the SQL database recovery is executed quickly, and the database can be turned to the functional mode without wasting any time.
Thanks for reading and let me know your valuable comments if any.
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This is a guest post by Priyanka Chauhan. If you would like to write for DotnetCrunch, check our guest posting guidelines.