What is DBCC Sqlperf?
DBCC SQLPERF is very useful command that we use to get multiple statistics related information in SQL Server. This command provides transaction log space statistics and wait statistics information at instance level and we also use it to reset wait and latch statistics data.
What is Fn_dblog?
The fn_dblog() function (formerly known as the DBCC command) is one of several undocumented functions for SQL Server. It allows you to view the transaction log records in the active part of the transaction log file for the current database.
How do I find unused spaces in SQL?
Get a list of databases file with size and free space for a database in SQL Server:
- SELECT DB_NAME() AS DbName,
- name AS FileName,
- size/128.0 AS CurrentSizeMB,
- size/128.0 – CAST(FILEPROPERTY(name, ‘SpaceUsed’) AS INT)/128.0 AS FreeSpaceMB.
- FROM sys. database_files.
- WHERE type IN (0,1);
What are the DBCC commands in SQL Server?
DBCC Internal Database Snapshot Usage
- DBCC CHECKALLOC.
- DBCC CHECKCATALOG.
- DBCC CHECKDB.
- DBCC CHECKFILEGROUP.
- DBCC CHECKTABLE.
What causes LDF to grow?
ldf file growing to insane sizes if left unchecked. A large LDF file will result in the web application running extremely slow or most likely just timing out, not to mention affecting the performance of other databases setup on that same server. We used to manually detach the database rename the .
How do you find out who deleted records in SQL Server?
Right click SQL Server Instance and Select Reports -> Standard Reports -> Schema Changes History as shown in the below snippet. 3. This will open up Scheme Changes History report which will have the details about who deleted the SQL Server Database along with the timestamp when the database was deleted.
How do I find the LSN number in SQL Server?
Go to the LSN for the master database and other data files We can use the sys. master_files to get the LSN of the database creation. Also, we can get the LSN of the differential backup. Backup_lsn shows the LSN of the last backup.
How do I reclaim space after truncate in SQL Server?
Build another file group with a single file in it so that when you truncate the table, you don’t need to shrink your primary file group. If you want to almost instantly recover the file space from the unused test table, drop it, then drop the file in the file group and then rebuild both.
Why do we use DBCC command?
Microsoft SQL Server Database Console Commands (DBCC) are used for checking database integrity; performing maintenance operations on databases, tables, indexes, and filegroups; and collecting and displaying information during troubleshooting issues.
How do I run sqlperf on SQL Server?
On SQL Server to run DBCC SQLPERF(LOGSPACE) requires VIEW SERVER STATE permission on the server. To reset wait and latch statistics requires ALTER SERVER STATE permission on the server. On SQL Database Premium and Business Critical tiers requires the VIEW DATABASE STATE permission in the database.
What does DBCC sqlperf do in SQL Server?
Have you ever wondered what does DBCC SQLPERF do in SQL Server? Well, I have often thought about it and here is the most simple answer for the same. This method displays the current size of the transaction log and the percentage of log space used for the database. Here is a simple example of the code. Here is the result set of the above query.
What permissions are required to run sqlperf (logspace)?
On SQL Server to run DBCC SQLPERF (LOGSPACE) requires VIEW SERVER STATE permission on the server. To reset wait and latch statistics requires ALTER SERVER STATE permission on the server. On SQL Database Premium and Business Critical tiers requires the VIEW DATABASE STATE permission in the database.
How do I get the space usage of a SQL Server transaction?
Starting with SQL Server 2012 (11.x), use the sys.dm_db_log_space_usageDMV instead of DBCC SQLPERF(LOGSPACE), to return space usage information for the transaction log per database. The transaction log records each transaction made in a database.