Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -
2017-04-27 10:42
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mysql -A不预读数据库信息(use dbname 更快)—Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A
出现问题的原因是::我们进入mysql 时，没有使用-A参数；
即我们使用
mysql -hhostname -uusername -ppassword -Pport 的方式进入数据，
而没有使用
mysql -hhostname -uusername -ppassword -Pport -A的方式进入数据库。
当我们打开数据库，即use dbname时，要预读数据库信息，当使用-A参数时，就不预读数据库信息。
关键的因素是你的数据库变大了。系统变慢了
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