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Transaction isolation level

Giuseppa Cefalu
Ranch Hand

Joined: Jul 15, 2011
Posts: 121
Hi,

For the 3 isolation levels 1.- SET GLOBAL TRANSACTION ISOLATION LEVEL SERIALIZABLE, 2.-
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE and 3.- SET SESSION ISOLATIOn LEVEL SERIALIZABLE.
When should I used each one?

thank you
Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18989
    
    8

Well, here's somebody's explanation of what that means to MySQL; I expect it applies to other databases as well: SET TRANSACTION.
Giuseppa Cefalu
Ranch Hand

Joined: Jul 15, 2011
Posts: 121
Thanks! I use MySQL.
Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18989
    
    8

I found that by using "SET GLOBAL TRANSACTION ISOLATION LEVEL SERIALIZABLE" as my Google keywords, by the way. However most of the first page of results weren't quite about that exact string, just resources talking about transaction isolation level in general.
Giuseppa Cefalu
Ranch Hand

Joined: Jul 15, 2011
Posts: 121
Here is a link a found useful: http://dev.mysql.com/doc/refman/5.0/en/set-transaction.html
 
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subject: Transaction isolation level