Home Database Mysql Tutorial MySQL 导入慢的解决方法

MySQL 导入慢的解决方法

Jun 07, 2016 pm 06:02 PM
mysql

MySQL导出的SQL语句在导入时有可能会非常非常慢,在导出时合理使用几个参数,可以大大加快导 入的速度。

导入注意点:
使用phpmyadmin或navicat之类的工具的导入功能还是会相当慢,可以直接使用mysql进行导入
导入命令如下:mysql> -u -p 便可以了
说明:mysql> -u -p
这样导入将会非常快,之前数小时才能导入的sql现在几十秒就可以完成了。

导出时候注意点:
使用包括几个VALUES列表的多行INSERT语法;
XXX 客户端/服务器之间通信的缓存区的最大大小;
XXX TCP/IP和套接字通信缓冲区大小,创建长度达net_buffer_length的行。
注意:max_allowed_packet和net_buffer_length不能比目标数据库的设定数值 大,否则可能出错。
首先确定目标库的参数值
mysql>show variables like 'max_allowed_packet';
mysql>show variables like 'net_buffer_length';
根据参数值书写mysqldump命令,如:
mysql>mysqldump -u -p goodclassification -e --max_allowed_packet=1048576 --net_buffer_length=16384 >www.jb51.net.sql
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