Article about tracking presents only small information about the topic.

[shoter]

This article present very little info about tracking. It does answer following questions:

1. How does tracking affect future queries that query the same entity?
2. What will happen if I execute for example context.Entities.Where(e => e.Name.StartsWith("zix") twice in the row
3. How tracking works with TransactionScope and overall with transactions.
4. Does IsolationLevel of transaction impacts tracking?
5. What are criteria for LINQ query to return tracking entity and skip SQL query?
6. Why my query inside RepeatableRead transaction returns cached data from queries outside transaction when I just changed data manually from db side? Why afterwards I have read lock when I am using old tracked entity? It does not make sense - did I make some kind of SQL Query then but it is not updating my entity?
7. What is lifespan of tracked entities? Do they even have lifespan?
8. Is there a limit of how many tracked entities EF can have?
9. Are there any performance considerations we should think about when using tracking?
10. How can I disable tracking for whole DbContext? Is it possible?

Therefore this article is a stub and it explains nothing of importance.

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Document Details

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• ID: f3ffc114-df51-0be7-8972-6fcead14e011
• Version Independent ID: 94c34571-7314-aab1-7898-93ac6d0f3430
• Content: Tracking vs. No-Tracking Queries - EF Core
• Content Source: entity-framework/core/querying/tracking.md
• Product: entity-framework
• Technology: entity-framework-core
• GitHub Login: @smitpatel
• Microsoft Alias: avickers

[smitpatel]

Questions for @dotnet/efteam
#2803 clarifies 1,2,5

9,10 is already answered by existing article.

I am not sure how/where/what we should document for rest.

[ajcvickers]

• 1. How does tracking affect future queries that query the same entity?
• 2. What will happen if I execute for example context.Entities.Where(e => e.Name.StartsWith("zix") twice in the row
• 3. How tracking works with TransactionScope and overall with transactions.
• 4. Does IsolationLevel of transaction impacts tracking?
• 5. What are criteria for LINQ query to return tracking entity and skip SQL query?
• 6. Why my query inside RepeatableRead transaction returns cached data from queries outside transaction when I just changed data manually from db side? Why afterwards I have read lock when I am using old tracked entity? It does not make sense - did I make some kind of SQL Query then but it is not updating my entity?
• 7. What is lifespan of tracked entities? Do they even have lifespan?
• 8. Is there a limit of how many tracked entities EF can have?
• 9. Are there any performance considerations we should think about when using tracking?
• 10. How can I disable tracking for whole DbContext? Is it possible?