Tag: performance

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Some tips for using tempdb database in SQL Server 2017

Some tips for using tempdb database in SQL Server 2017 Set the reasonable size for the tempdb database and transaction log. First of all you should estimate how large your tempdb database will be. To estimate the reasonable database size, you should estimate the size of each table individually, add some additional space (10-20%) and then add the values obtained....

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Basics: Your performance bottleneck may not be what you think it is

Been running into an interesting trend in working on different systems, looking for performance issues, finding things that need to be addressed.  Typically it all starts with a client that is confused about the performance they’re seeing after an upgrade that was supposed to fix everything automagically, but doesn’t seem to have accomplished that once completed. There are many, many […]

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Tips for using SQL Server 2017 triggers

Tips for using SQL Server 2017 triggers Try to use CHECK constraints instead of triggers whenever possible. Constraints are much more efficient than triggers and can boost performance. Constraints are also more consistent and reliable in comparison with triggers, because you can make errors when you write your own code to perform the same actions as the constraints. So, you...

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Tips for using constraints in SQL Server 2017

Tips for using constraints in SQL Server 2017 Use cascading referential integrity constraints instead of triggers whenever possible. For example, if you need to make cascading deletes or updates, specify the ON DELETE or ON UPDATE clause in the REFERENCES clause of the CREATE TABLE or ALTER TABLE statement. The cascading referential integrity constraints are much more efficient than triggers...

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Tips for using bulk copy in SQL Server 2017

Tips for using bulk copy in SQL Server 2017 Consider using BULK INSERT to insert data from files stored in Azure Blob storage. Beginning with SQL Server 2017 BULK INSERT command enable access data directly from a file specified as CSV format, and from files stored in Azure Blob storage through the new BLOB_STORAGE option of EXTERNAL DATA SOURCE. Use...

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Tips for using Very Large Databases in SQL Server 2017

Tips for using Very Large Databases in SQL Server 2017 Create a user-defined filegroup and create some tables in it to run maintenance tasks (backups, DBCC, update statistics, and so on) against these tables. You can place a table in its own filegroup and can backup and restore only this table. So you can group user objects with similar maintenance...

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Tips for using indexes in SQL Server 2016 (Part 2)

Tips for using indexes in SQL Server 2016 (Part 2) Drop indexes that are not used. Because each index take up disk space and slow down the adding, deleting, and updating of rows, you should drop indexes that are not used. You can use Database Engine Tuning Advisor to identify indexes that are not used in your queries. Keep your...

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SQL Server 2016 Transact-SQL Optimization Tips (Part 1)

SQL Server 2016 Transact-SQL Optimization Tips (Part 1) Consider using a new query hint NO_PERFORMANCE_SPOOL. This hint was first introduced in SQL Server 2016 and can prevent a spool operator from being added to query plans. This can improve performance when many concurrent queries are running with spool operations. Try to restrict the queries result set by using the WHERE...

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Tips for using SQL Server 2016 Integration Services (Part 3)

Tips for using SQL Server 2016 Integration Services (Part 3) Consider encrypting Integration Services packages. SQL Server 2016 Integration Services packages can be encrypted with various levels of encryption. By encrypting packages, you can protect sensitive data. If you need to modify column values, you can use the Data Conversion and Derived Column transformations. These transformations were first added in...

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Tips for using SQL Server 2016 Integration Services (Part 1)

Tips for using SQL Server 2016 Integration Services (Part 1) Integration Services (SSIS) were first introduced in SQL Server 2005 and replace the Data Transformation Services (DTS). By using the SSIS you can load data into or out from SQL Server relational databases or data warehousing. In this article, you can find some tips to boost the SQL Server 2016...

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