Slow performance when querying large datasets with Entity Framework Core 6.0 and SQL Server
I'm a bit lost with Quick question that's been bugging me - I'm currently working with important performance optimization while querying large datasets using Entity Framework Core 6.0 with SQL Server. My application is designed to retrieve user transaction records, and while testing with a dataset of around 1 million records, the response time exceeds 10 seconds for a simple query. Here's the LINQ query I'm using: ```csharp var transactionRecords = await dbContext.Transactions .Where(t => t.UserId == userId) .OrderByDescending(t => t.TransactionDate) .ToListAsync(); ``` I've checked the database indices, and there is an index on the `UserId` and `TransactionDate`. However, the performance is still not up to par. I also tried using `AsNoTracking()` to improve read performance for my queries, but that didn’t seem to help either. I profiled the SQL generated by Entity Framework, and it looks something like: ```sql SELECT * FROM Transactions WHERE UserId = @userId ORDER BY TransactionDate DESC; ``` Could someone provide insights on optimizing this query? Are there specific strategies or configurations in EF Core 6.0 that I might be missing? I’m also open to suggestions on altering the database schema if that’s what it takes to achieve better performance. Any help would be greatly appreciated! This is part of a larger API I'm building. Any ideas what could be causing this? I'd really appreciate any guidance on this. I'm coming from a different tech stack and learning C#. Thanks for your help in advance!