Abstract: Selecting a database implementation fit for specific data analytic purposes is often challenging due to manufacturers' bias in database performance reporting. This paper aims to compare disk ...

在 MySQL 的面试中有一类经典的面试题。比如：如何给正在线上运行的表执行 DDL 语句？ 回答这个问题，首先我们需要明确，执行 DDL 语句的时候，MySQL 会干什么？ 在 MySQL 5.6 之前，执行 DDL 语句的时候，会给表添加写锁，会阻塞该表其他所有的读写操作。这对 ...

Humans are far closer to meerkats and beavers for levels of exclusive mating than we are to most of our primate cousins, according to a new University of Cambridge study that includes a table ranking ...