Update Trace Flag 3895 Demo

Author: ktaranov

Scripts/Trace_Flag/Trace_Flag_3895.sql

@@ -1,11 +1,17 @@
 /*
-https://docs.microsoft.com/en-us/sql/relational-databases/databases/tempdb-database
+Trace Flag Demo: 3895
+!!! Undocumented trace flag !!!
+Function: In SQL Server 2019, when you enable the [Memory-Optimized TempDB Metadata](https://docs.microsoft.com/en-us/sql/relational-databases/databases/tempdb-database) feature, this trace flag is automatically enabled after the next restart.
+When you disable that feature, the trace flag is automatically removed after the next restart.
+Also if you add race flag 3895 to startup parameters after restarting SQL Server option `IsTempdbMetadataMemoryOptimized` will be enabled.
+SQL Server Version: 2019
+Information link: https://github.com/ktaranov/sqlserver-kit/blob/master/SQL%20Server%20Trace%20Flag.md#3895
 */
 
 /* Check is it session trace flag? */
 DBCC TRACEON (3895);
 GO
-/* Answer - no
+/* Answer - NO
 Ignoring trace flag 3895. It is either an invalid trace flag or a trace flag that can only be specified during server startup.
 DBCC execution completed. If DBCC printed error messages, contact your system administrator.
 */
@@ -14,11 +20,13 @@ DBCC execution completed. If DBCC printed error messages, contact your system ad
 DBCC TRACESTATUS(-1);
 GO
 
+/* https://docs.microsoft.com/en-us/sql/relational-databases/databases/tempdb-database */
 ALTER SERVER CONFIGURATION SET MEMORY_OPTIMIZED TEMPDB_METADATA = ON;
 
 /* RESTART SQL SERVER */
 DBCC TRACESTATUS(-1);
 GO
+/* Return that 3895 trace flag is enabled */
 
 SELECT SERVERPROPERTY('IsTempdbMetadataMemoryOptimized') AS IsTempdbMetadataMemoryOptimized;
 /* Return 1 (enabled) */