TempDB Enhancements in SQL Server 2016 (and later)

In this article, we will be discussing about the main TempDB enhancements in SQL Server 2016 (and later) installation process.


About the SQL Server TempDB System Database

TempDB system database plays a major role when it comes to performance in SQL Server. TempDB is available to all users connected to a SQL Server instance and it is used to hold local or global temporary tables, temporary stored procedures, table variables and cursors.


The Importance of the TempDB SQL Server System Database

Another example of when TempDB is used, is when you make use of the ‘SORT_IN_TEMPDB‘ option when you create or rebuild an index. This option tells SQL Server’s Database Engine to store the intermediate sort results that are used to build the index in the TempDB system database.

For all the above, and more, properly configuring the TempDB database plays a significant role to SQL Server’s performance.


TempDB Enhancements in SQL Server 2016

Until SQL Server 2014, you would usually install the SQL Server instance and then tune the TempDB database after installation.
SQL Server 2016 or later now provides you with the capability of configuring the TempDB database during the installation of a SQL Server instance along with some other other enhancements. These are:

    • All files will grow at the same time (no need for Trace flags 1117 and 1118)
    • By default Setup adds as many tempDB Files as the CPU count (max=8)
    • Through Setup you can specify:
      • No. of tempdb database files, initial size, autogrowth and directory placement (you can set multiple volumes for tempDB database files)
      • Initial size of log file, autogrowth and directory placement

The above assist the DBA to properly configure the TempDB system database faster and simpler during the setup of SQL Server, thus ensuring a performant tempDB configuration.

Below you can find a screenshot taken during the installation of SQL Server 2016 that illustrates the TempDB configuration dialog:

TempDB Enhancements in SQL Server 2016 and later - Article on SQLNetHub
Figure 1: TempDB configuration screen during SQL Server 2016 installation.


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