摘要:
The figure 1a does not draw any lines, while the figure 1b works well.The key concept is “group” in aes.The rule is simple: So, by specifying group=g 阅读全文
摘要:
1, 查看MySQL服务器配置信息 mysql> show variables; 2, 查看MySQL服务器运行的各种状态值 mysql> show global status; 3, 慢查询 mysql> show variables like '%slow%'; + + + | Variable 阅读全文