计算redo使用的比例
while true ; do mysql -h127.0.0.1 -usbtest -psbtest -Bse "show engine innodb status\G" | grep "flushed up to" | awk '{print $5}' | tr "\n" " " | awk '{ print ($1-$2)/1024.0/1024}'; sleep 1; done
while true ; do mysql -h127.0.0.1 -usbtest -psbtest -Bse "show engine innodb status\G" | grep "flushed up to" | awk '{print $5}' | tr "\n" " " | awk '{ print ($1-$2)/1024.0/1024}'; sleep 1; done