mysql简单的碎片清理脚本

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　　mysql简单的碎片清理脚本
　　#!/bin/bash
　　date=`date +"%Y-%m-%d %H:%M:%S"`
　　echo $date >>/root/qingli.log
　　tables=$(/usr/local/mysql/bin/mysql -u root -p"tina" 2>/dev/null -e "select concat(table_schema,'.',table_name) from information_schema.tables where data_free>0 and engine !='MEMORY';" |grep -v "concat" |grep -v "tinatest" |grep -v "information_schema" |grep -v "mysql")
　　for table in $tables
　　do
　　/usr/local/mysql/bin/mysql -u root-p"tina" 2>/dev/null -e "optimize no_write_to_binlog table $table;" >>/root/qingli.log
　　done
　　添加no_write_to_binlog，是为了保证只在这个主库上执行，这个命令不用传到从库，以免从库执行过久，导致同步延迟