SQLRx – The Daily DoseGet a list of CLR’s registered to a database. This is helpful when migrating or troubleshooting. For more information on CLR’s check out Books Online or http://msdn.microsoft.com/en-us/library/ms131089(SQL.100).aspx SELECT o.name AS ObjectName, a.name AS Assembly, o.type_desc AS ObjectType FROM sys.assembly_modules am JOIN sys.objects o ON am.object_id = o.object_id JOIN sys.assemblies a ON a.assembly_id = [...]
Many times when upgrading SQL Server or migrating to new hardware, it is necessary to rename the server when it’s ready to be used as production. However, if any maintenance plans created before the server was renamed are still present after the rename, you may find that trying to delete the old jobs results in [...]
Your SQL database uses statistics to choose the most efficient plan for retrieving or updating data, so you want them accurate and up-to-date. Otherwise, it can cause the SQL Server engine to take the wrong path, and taking the wrong path means slower performance. Check out the code below to see when your stats were last [...]
Every DBA has encountered a database that has a mystery statement that will unexpectedly cause either the transaction log or a table to grow out of control and fill the drive. Here is a way to find out who is running what statement that is causing the problem. Find out what statements are causing database [...]
Databases will go into suspect state for a multitude of reasons. If you find your database in SUSPECT state, check all error logs and the Windows Event Log for any related errors, and try to resolve them. This is a disaster situation! Refer to the script below for help. SQL Server Administration: You can try to [...]
Disk performance is a common issue on SQL Server systems. In these situations, it is very useful to know how much SQL Server is waiting for I/O and what files are handling the most work or experiencing the poorest performance. The virtual file stats DMF provides this information and is ideal for periodic captures, e.g., [...]
If you performed an in place upgrade of your SQL Server, your master database may be at a lower compatibility level than all of the other system databases. This was done by conscious decision from Microsoft in an attempt to make for a smooth upgrade and ensure that existing applications can still function post upgrade. [...]
Database backups are a critical part of SQL Server disaster planning. It’s also critical to know
that your backups are viable.
Performance Monitor: Monitor the performance counters SQLServer:Buffer Manager (Page reads/sec) and SQLServer:Buffer Manager (Page writes/sec) to detect poor performance. These counters measure physical IOs and not logical IOs. Heavy activity can indicate lack of database memory, a poor table implementation or can show that applications are not accessing a database correctly. Monitoring these counters will [...]
DBA’s need to know when it is safe to stop services or to do other work. It is preferable to do such things when no jobs are running to prevent job failures and data integrity issues. Check out the query below to help. SQL Server Administration: Find the next time that any enabled job will run. Run the [...]
