Performance issues and fixes -- MySQL 5.6 Semi-Synchrnous ReplicationLong time ago I wrote a blog post that we started using Semi-Synchronous replication in production at Facebook. We are running our own MySQL facebook-5.6 branch, which added many replication (including Semisync) patches. Some of them were also merged with WebScaleSQL. Recently I heard from people from community that they were suffering from Semisync performance issues in official MySQL 5.6. I took
