Running out of disk space in tempdb can cause significant disruptions in the SQL Server production environment and can prevent applications that are running from completing operations. You can use the sys.dm_db_file_space_usage dynamic management view to monitor the disk space that is used by these features in the tempdb files. Additionally, to monitor the page allocation or deallocation activity in tempdb at the session or task level, you can use the sys.dm_db_session_space_usage and sys.dm_db_task_space_usage dynamic management views. These views can be used to identify large queries, temporary tables, or table variables that are using lots of tempdb disk space. There are also several counters that can be used to monitor the free space that is available in tempdb and also the resources that are using tempdb. For more information, see Troubleshooting Insufficient Disk Space in tempdb.
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