MySQL 找出体积最大的10个表

• 2019 年 10 月 4 日
• 筆記

采集MySQL  top ten 体积的表明细情况：

脚本如下：

source /etc/profile  USER='root'  PASSWD='123456'  SOCKET='/tmp/mysql.sock'  HOST='localhost'  datadir=$(/usr/local/mysql/bin/mysql 2>/dev/null -u${USER} -p${PASSWD} -h${HOST} -S ${SOCKET}   -BNe 'select @@datadir')  total_size=$(du -sc $datadir | tail -1 | sed 's/total//g' | sed 's/total//g' )  IP_ADDR=$(/sbin/ip a|egrep '10.[0|1].[1-9]+.[1-9]+*' | awk '{print $2}'| cut -d '/' -f 1);  mysql -u${USER} -p${PASSWORD}  -h ${HOST} -S ${SOCKET} 2>/dev/null -e "set @ip='$IP_ADDR'; set @total_size='$total_size';  SELECT @ip AS IP_ADDR,      date_format(now(),'%Y-%m-%d') AS INSERT_DATE ,      CONCAT(table_schema, '.', table_name) AS TB_NAME,      table_rows AS ROWS,      data_length  AS DATA,      index_length  AS idx,   ( data_length + index_length ) AS total_size,      index_length / data_length AS idxfrac,   ROUND((data_length+index_length)/@total_size/1024,2) as pct   FROM information_schema.TABLES where table_schema NOT IN ('mysql','test','information_schema','heartbeat','performance_schema')      ORDER BY ( data_length + index_length ) DESC LIMIT 10 ; "

脚本里面带上了采集时间、机器的IP、datadir总大小。 

我们还可以用python脚本将这些采集到的数据按行插入到远程数据库中，或者json格式上送到数据库运维平台的接口达到metrics入库的目的。