SQL Server: Deadlock Issues When Using Indexed Views with Concurrent Inserts
I need some guidance on I'm currently experiencing deadlock issues when performing concurrent inserts into a SQL Server database that utilizes indexed views... The indexed view is designed to aggregate data from a large table, and I've noticed that when two or more sessions try to insert into the base table at the same time, deadlocks frequently occur. The behavior message I'm receiving is: ``` Transaction (Process ID 62) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Return the transaction. ``` Here’s a simplified version of my indexed view definition: ```sql CREATE VIEW dbo.MyIndexedView WITH SCHEMABINDING AS SELECT Col1, SUM(Col2) AS TotalCol2 FROM dbo.MyBaseTable GROUP BY Col1; CREATE UNIQUE CLUSTERED INDEX IX_MyIndexedView ON dbo.MyIndexedView(Col1); ``` I have a trigger that executes an insert into `MyBaseTable` whenever new records are added to a related table. The insert statement looks like this: ```sql INSERT INTO dbo.MyBaseTable (Col1, Col2) VALUES (@Col1, @Col2); ``` I've tried using the `WITH (NOLOCK)` hint on my select queries, but that hasn't resolved the deadlock scenario. Additionally, I've examined the execution plan and noticed that the indexed view is significantly slowing down concurrent inserts, which I suspect is contributing to the deadlocks. I've also looked into using the `READ_COMMITTED_SNAPSHOT` isolation level, but I'm wary of potential consistency issues. What strategies can I adopt to minimize the deadlocks while still maintaining the performance benefits of the indexed view? Are there any best practices for handling indexed views in a highly concurrent environment like this? I'm working on a microservice that needs to handle this. What's the best practice here? Cheers for any assistance!