The Log Space Usage DMV, sys.dm_db_log_space_usage, returns one row that shows how big the transaction log is, how full it is, and how much log has built up since the last log backup. This post builds a demo, reads each column, and uses the value to decide when a log backup is worth taking. It also covers open transactions and the simple recovery model.
SQL SERVER – Puzzle – Solution – Why Does UNION ALL Work but UNION Produces Error?
Here is the answer to my puzzle: why does UNION ALL work but UNION produces an error with a TEXT column? It comes down to how UNION removes duplicates.
How to List All the Nonclustered Indexes of Your Table? – Interview Question of the Week #155
How do you list all the clustered and nonclustered indexes of your table, including columnstore? Here is the script I use in my performance health checks.
SQL SERVER – Log Shipping Monitor Not Getting Updated
The log shipping monitor stopped updating last_backup_file and last_backup_date for the primary, while every job ran fine. Here is how I traced it.
SQL SERVER – Error: 17142 – SQL Server Service has Been Paused. No New Connections Will be Allowed
What happens when you pause the SQL Server service? Error 17142 appears and no new connections are allowed, while existing users keep working. Here is the fix.
SQL SERVER – Puzzle – Why Does UNION ALL Work but UNION Produces Error?
A puzzle with TEXT columns: UNION ALL works fine, but UNION produces error. Can you tell why? The hint is in how UNION removes duplicates.
SQL SERVER – Slow Filestream Data Cleanup. What Should We Do?
Slow Filestream Data Cleanup can follow deletion when files are still ineligible for garbage collection. One customer was running out of space.