I took a quick look at MariaDB 10.0 single-threaded performance (simple read-only sysbench). One thing immediately leaps to the eye, and I thought it worthy of mention. It contains an important lesson about the use of synchronisation primitives and in particular “atomic operations” in MariaDB (and MySQL). I am using the Linux perf tool on… Continue reading MySQL/MariaDB single-threaded performance regressions, and a lesson in thread synchronisation primitives