????????絽?????????????????????????????????8w????????????????У????????????????????3??С??????????????￡???????????????400ms?????
??????????????????????????????????????й???????????3С????????????????￡?
????1??iops????????????湻??
????2??cpu???????????к?????????????????????????????????°?
????3?????????????????????
????4??8w?????????????????ú???????????????????????????10s
????5?????sql????????????explain????????????????????????????????rows???????????????裬?????
????6??sql????????? update table1 set bb=1 where aa=123
????7????????????????????aa????????ò???int???????????????aa???????varchar
????8?????sql???update table1 set bb=1 where aa=’123′
????9????????????8w????????????????10s
??????????
???????aa??varchar???????????????????????????aa?????????????ò???????????????????????????