From: Zardosht Kasheff Date: February 21 2013 4:20am Subject: Are handlerton->commit calls serialized in MySQL 5.6? List-Archive: http://lists.mysql.com/internals/38730 Message-Id: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Hello all, In http://lists.mysql.com/internals/38715, I learned quite a bit about MySQL 5.6 replication, but also saw something interesting that I would like to learn more about. As covered in that thread, handlerton->commit calls made with thd->durability_properties set to HA_IGNORE_DURABILITY means the enginecan ignore the durability requirements of commits. However, I also saw that such calls are serialized under some global mutex. Is this accurate? Is this mutex a MySQL mutex or an InnoDB mutex? If so, how is concurrency affected? Is this any different than how MySQL 5.5 behaves? Thanks -Zardosht