Over the past few months Ive written a couple of posts about dangerous debt of InnoDB Transactional History and about the fact MVCC can be the cause of severe MySQL performance issues. In this post I will cover a related topic  InnoDB Transaction Isolation Modes, their relationship with MVCC (multi-version concurrency control) and how [&]

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http://www.percona.com/blog/2015/01/14/mysql-performance-implications-of-innodb-isolation-modes/