Do UPDATEs block SELECTs?

All we need is an easy explanation of the problem, so here it is.

I need to query a frequently updated record, does it wait until all updates finish?

  • /updateUser/1

    Many requests are sent

    UPDATE users SET count = count + 1 WHERE id = 1 LIMIT 1
    
  • /getUser/1

    While the user is being updated i perform this request

    SELECT * from users WHERE id = 1 LIMIT 1
    

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

By default, writers do not block readers. So no, the SELECT would not have to wait for the UPDATE to finish.

Exception cases:

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

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