Mysql数据库优化系列(二)
一、查看数据库性性能: showstatus; 挑选出几个比较重要的参数 二、AWK简单脚本编程实现数据库性能统计 1.新建Viscore.txt 2.写下如下数据: 3.每秒刷新一次,并写入一个文件进行分析 三、AWK语法简介 Awk 是一个简便的直译式的文本处理工具 . 擅长处理 --
一、查看数据库性性能:
show status;
挑选出几个比较重要的参数
二、AWK简单脚本编程实现数据库性能统计
1.新建Vi score.txt
2.写下如下数据:
3.每秒刷新一次,并写入一个文件进行分析
三、AWK语法简介
Awk是一个简便的直译式的文本处理工具.擅长处理--多行多列的数据。
处理过程:
While(还有下一行) {
1:读取下一行,并把下一行赋给$0,各列赋给$1,$2...$N变量
2: 用指定的命令来处理该行
}
如何处理1行数据?
答: 分2部分, pattern (条件) + action(处理动作)
第1个简单awk脚本
awk ‘{printf “%s\n” , $1}’ xx.txt // 把xx.txt的每一行进行输出
第2个简单awk脚本 统计mysql服务器信息
mysqladmin -uroot ext|awk
'Queries/{q=$4}/Threads_connected/{c=$4}/Threads_running/{r=$4}END{printf("%d %d %d\n",q,c,r)}'

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