Lesson Learned #343: DISABLE_VERSIONING Wait Type and ALLOW_SNAPSHOT_ISOLATION
This blog post is a step-by-step guide to help you understand the importance of Lesson Learned #343: DISABLE_VERSIONING wait type and ALLOW_SNAPSHOT_ISOLATION. By understanding the basics of this lesson, you’ll be able to optimize your cloud-based application’s performance.
What is Lesson Learned #343?
Lesson Learned #343 is a recommendation from Microsoft’s Azure Database Support team that suggests disabling the VERSIONING wait type if the ALLOW_SNAPSHOT_ISOLATION database option is enabled. This can help optimize the performance of your cloud-based application.
Why is this important?
The VERSIONING wait type is used to manage different versions of data in the database. When multiple versions of the same data exist, the database will require more time to resolve the conflicts and maintain consistency. By disabling the VERSIONING wait type, the database can quickly process transactions and maintain consistency, leading to improved performance. Additionally, disabling the VERSIONING wait type reduces the need for additional resources that would otherwise be needed to manage multiple versions of the same data.
How to enable ALLOW_SNAPSHOT_ISOLATION?
The ALLOW_SNAPSHOT_ISOLATION database option enables a transaction to access the data as it was at the start of the transaction. This ensures that any changes made by other transactions will not be visible until the transaction is committed. To enable ALLOW_SNAPSHOT_ISOLATION, you must first set the option to TRUE using an ALTER DATABASE statement and then enable the READ COMMITTED SNAPSHOT isolation level. This can be done using a SET TRANSACTION statement.
When should you disable VERSIONING wait type?
The VERSIONING wait type should be disabled when the ALLOW_SNAPSHOT_ISOLATION database option is enabled. This will prevent the database from spending time managing multiple versions of the same data and improve the performance of your application. Additionally, disabling the VERSIONING wait type will reduce the need for additional resources that would otherwise be needed to manage multiple versions of the same data.
Popular Questions Related to Lesson Learned #343
* What is Lesson Learned #343?
* Why is this important?
* How do I enable ALLOW_SNAPSHOT_ISOLATION?
* When should I disable VERSIONING wait type?
* What are the benefits of disabling VERSIONING wait type?
Conclusion
In conclusion, Lesson Learned #343 is a recommendation from Microsoft’s Azure Database Support team that suggests disabling the VERSIONING wait type if the ALLOW_SNAPSHOT_ISOLATION database option is enabled. This can help optimize the performance of your cloud-based application by preventing the database from spending time managing multiple versions of the same data and reducing the need for additional resources.
