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Transaction isolation


Transaction isolation

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aries27_himani
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Comments posted to this topic are about the item Transaction isolation
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Thanks for easy question.

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Koen Verbeeck
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Easy one, thanks.
For the moment, almost 30% took Read Commited (the default). Surprising, as Repeatable Read is stricter.


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There needs to be more questions on isolation levels.



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Koen Verbeeck
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SQLRNNR (4/19/2012)
There needs to be more questions on isolation levels.


Looking at the current score, certainly. 32% for Read Committed.
If Snapshot Isolation was one of the answers, I would understand a lot of people getting it wrong, but this isn't the case.


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Stewart "Arturius" Campbell
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Agree, need more questions on this topic.
Thanks for the easy question.

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Good question!

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Tom Thomson
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Nice easy question.

Koen Verbeeck (4/19/2012)
SQLRNNR (4/19/2012)
There needs to be more questions on isolation levels.


Looking at the current score, certainly. 32% for Read Committed.
If Snapshot Isolation was one of the answers, I would understand a lot of people getting it wrong, but this isn't the case.


Yes, some education is needed in this area. The results aren't quite as bad now as when Koen saw them, but currently 27% opted for for READ COMMITTED (the second lowest isoaltion level) which is certainly not good. And the thing that really gets me is 2% saying Read Uncommitted!

Tom

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L' Eomot Inversé (4/19/2012)

Yes, some education is needed in this area. The results aren't quite as bad now as when Koen saw them, but currently 27% opted for for READ COMMITTED (the second lowest isoaltion level) which is certainly not good. And the thing that really gets me is 2% saying Read Uncommitted!


I understand someone who selected Read Uncommited. It's very easy to mix or overlook "most" and "least". Insufficient level of coffee can also make a problem.

Those who selected Read Commited probably use two isolation levels. "Clean" and "Dirty". And even an idea of cleaner than clean is horrible for them.



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Great question, I just had to read up on this yesterday as part of an investigation. What timing. Thanks for the question.
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