Added a note about long-running processes.
There isn't much else to say, really.
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@ -164,6 +164,13 @@ Django provides a single API to control database transactions.
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- releases or rolls back to the savepoint when exiting an inner block;
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- commits or rolls back the transaction when exiting the outermost block.
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.. admonition:: Performance considerations
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Open transactions have a performance cost for your database server. To
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minimize this overhead, keep your transactions as short as possible. This
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is especially important of you're using :func:`atomic` in long-running
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processes, outside of Django's request / response cycle.
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Autocommit
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==========
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