What are TempDB files in SQL Server?

Question

TempDB overview The TempDB database is one of the most important SQL Server system databases, that is used to store temporary user objects, such as the temporary tables that are defined by the user or returned from table-valued function execution, temporary stored procedures, table variables or indexes. 13 янв. 2020 г.

What are tempdb files?

The tempdb system database is a global resource that holds: Temporary user objects that are explicitly created. They include global or local temporary tables and indexes, temporary stored procedures, table variables, tables returned in table-valued functions, and cursors.

Can I delete tempdb files?

All tempdb files are re-created during startup. However, they are empty and can be removed. To remove additional files in tempdb, use the ALTER DATABASE command by using the REMOVE FILE option. Use the DBCC SHRINKDATABASE command to shrink the tempdb database.

Why do I have multiple tempdb files?

Spreading TempDB across multiple data files to reduce contention. If you're using a dedicated drive for tempdb and you don't have enough space to create additional files, shrink the first data file to make room for the others.

How many tempdb files should I have?

According to Microsoft Support, the best approach is to create one tempdb data file per logical processor up to 8 data files. If your system has more than 8 logical processors, start with 8 data files and monitor your server's workload to determine if more data files would be beneficial.

Expert · Answer

The tempdb system database is a global resource that holds: Temporary user objects that are explicitly created. They include global or local temporary tables and indexes, temporary stored procedures, table variables, tables returned in table-valued functions, and cursors.

Expert · Answer

All tempdb files are re-created during startup. However, they are empty and can be removed. To remove additional files in tempdb, use the ALTER DATABASE command by using the REMOVE FILE option. Use the DBCC SHRINKDATABASE command to shrink the tempdb database.

Expert · Answer

Spreading TempDB across multiple data files to reduce contention. If you're using a dedicated drive for tempdb and you don't have enough space to create additional files, shrink the first data file to make room for the others.

Expert · Answer

According to Microsoft Support, the best approach is to create one tempdb data file per logical processor up to 8 data files. If your system has more than 8 logical processors, start with 8 data files and monitor your server's workload to determine if more data files would be beneficial.

What are TempDB files in SQL Server?