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本文主要给大家介绍MySQL迁移时经常会出现的有哪些错误，文章内容都是笔者用心摘选和编辑的，具有一定的针对性，对大家的参考意义还是比较大的，下面跟笔者一起了解下mysql迁移时经常会出现的有哪些错误吧。
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错误1：数据库做迁移时，往往会出现各种问题，比如performance_schema，数据库perfor这个出错，可以尝试用此命令修复：
mysql_upgrade -u root -p mysql_upgrade -u root -p --force
错误2：找不到指定的innodb目录。
在my.cnf配置文件中添加如下参数：
innodb_data_home_dir = /home/data/database innodb_data_file_path = ibdata1:10M:autoextend innodb_log_group_home_dir = /home/data/database
这里说一下正确迁移数据库的步骤：
1）初始化数据库目录：/data mysqld --initialize-insecure --basedir=/usr/local/mysql --datadir=/home/data/database --user=mysql --server-id=50 2）删除初始化目录下的文件：rm -rf ibdata1 iblogfile1 iblogfile2 mysql 3）把复制的数据库拷贝到初始化的目录下cp mysql ibdata1 iblogfile1 iblogfile2 /data/ 4）mysql_upgrade -u root -p #这一步至关重要，一般能解决迁移时所有问题。
拷贝的数据库可能出现各种错误，此时需要在my.cnf配置文件中设置innodb_force_recovery＝1 ，重启mysql，如果出错改为2一直到6试试。
错误3：迁移完数据库配置主从复制时，总是提示least set server_id:
删除mysql下的5张表。
drop table if exists innodb_index_stats; drop table if exists innodb_table_stats; drop table if exists slave_master_info; drop table if exists slave_relay_log_info; drop table if exists slave_worker_info;
然后删除：/data/mysql下相关的.frm .ibd文件 #如果没有则无需删除
rm -rf innodb_index_stats* rm -rf innodb_table_stats* rm -rf slave_master_info* rm -rf slave_relay_log_info* rm -rf slave_worker_info*
登录数据库：> source /usr/local/mysql/share/mysql_system_tables.sql #此命令不行的话需要重新建表。
use mysql CREATE TABLE `innodb_index_stats` ( `database_name` varchar(64) COLLATE utf8_bin NOT NULL, `table_name` varchar(64) COLLATE utf8_bin NOT NULL, `index_name` varchar(64) COLLATE utf8_bin NOT NULL, `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `stat_name` varchar(64) COLLATE utf8_bin NOT NULL, `stat_value` bigint(20) unsigned NOT NULL, `sample_size` bigint(20) unsigned DEFAULT NULL, `stat_description` varchar(1024) COLLATE utf8_bin NOT NULL, PRIMARY KEY (`database_name`,`table_name`,`index_name`,`stat_name`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0; ----------------------------------- CREATE TABLE `innodb_table_stats` ( `database_name` varchar(64) COLLATE utf8_bin NOT NULL, `table_name` varchar(64) COLLATE utf8_bin NOT NULL, `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `n_rows` bigint(20) unsigned NOT NULL, `clustered_index_size` bigint(20) unsigned NOT NULL, `sum_of_other_index_sizes` bigint(20) unsigned NOT NULL, PRIMARY KEY (`database_name`,`table_name`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0;
CREATE TABLE `slave_master_info` ( `Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file.', `Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log currently being read from the master.', `Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last read event.', `Host` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '' COMMENT 'The host name of the master.', `User_name` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The user name used to connect to the master.', `User_password` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The password used to connect to the master.', `Port` int(10) unsigned NOT NULL COMMENT 'The network port used to connect to the master.', `Connect_retry` int(10) unsigned NOT NULL COMMENT 'The period (in seconds) that the slave will wait before trying to reconnect to the master.', `Enabled_ssl` tinyint(1) NOT NULL COMMENT 'Indicates whether the server supports SSL connections.', `Ssl_ca` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Authority (CA) certificate.', `Ssl_capath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path to the Certificate Authority (CA) certificates.', `Ssl_cert` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL certificate file.', `Ssl_cipher` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the cipher in use for the SSL connection.', `Ssl_key` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL key file.', `Ssl_verify_server_cert` tinyint(1) NOT NULL COMMENT 'Whether to verify the server certificate.', `Heartbeat` float NOT NULL, `Bind` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'Displays which interface is employed when connecting to the MySQL server', `Ignored_server_ids` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The number of server IDs to be ignored, followed by the actual server IDs', `Uuid` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The master server uuid.', `Retry_count` bigint(20) unsigned NOT NULL COMMENT 'Number of reconnect attempts, to the master, before giving up.', `Ssl_crl` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Revocation List (CRL)', `Ssl_crlpath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path used for Certificate Revocation List (CRL) files', `Enabled_auto_position` tinyint(1) NOT NULL COMMENT 'Indicates whether GTIDs will be used to retrieve events from the master.', PRIMARY KEY (`Host`,`Port`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Master Information';
CREATE TABLE `slave_relay_log_info` ( `Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file or rows in the table. Used to version table definitions.', `Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the current relay log file.', `Relay_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The relay log position of the last executed event.', `Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log file from which the events in the relay log file were read.', `Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last executed event.', `Sql_delay` int(11) NOT NULL COMMENT 'The number of seconds that the slave must lag behind the master.', `Number_of_workers` int(10) unsigned NOT NULL, `Id` int(10) unsigned NOT NULL COMMENT 'Internal Id that uniquely identifies this record.', PRIMARY KEY (`Id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Relay Log Information';
CREATE TABLE `slave_worker_info` ( `Id` int(10) unsigned NOT NULL, `Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Relay_log_pos` bigint(20) unsigned NOT NULL, `Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Master_log_pos` bigint(20) unsigned NOT NULL, `Checkpoint_relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Checkpoint_relay_log_pos` bigint(20) unsigned NOT NULL, `Checkpoint_master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, `Checkpoint_master_log_pos` bigint(20) unsigned NOT NULL, `Checkpoint_seqno` int(10) unsigned NOT NULL, `Checkpoint_group_size` int(10) unsigned NOT NULL, `Checkpoint_group_bitmap` blob NOT NULL, PRIMARY KEY (`Id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Worker Information';
重启mysql。
错误：mysql.user has no `Event_priv` column at position 28
/usr/local/mysql/bin/mysqld --defaults-file=/usr/local/mysql/my.cnf --initialize-insecure
select user,host,authentication_string,plugin from mysql.user; #查看用户状态
UPDATE mysql.user SET authentication_string=PASSWORD('password') WHERE User='root' and host='localhost';
FLUSH PRIVILEGES;
/usr/local/mysql/bin/mysqld_safe --defaults-file=/usr/local/mysql/my.cnf --skip-grant-tables &
/usr/local/mysql/bin/mysql_upgrade --defaults-file=/usr/local/mysql/my.cnf -p --force GRANT ALL PRIVILEGES ON *.* TO 'test1'@'localhost' IDENTIFIED BY 'password'; #创建一个测试用的账户
select user,host,authentication_string,plugin from mysql.user; #用户状态还是错误
UPDATE mysql.user SET authentication_string=PASSWORD('password') WHERE User='test1' and host='localhost';
UPDATE mysql.user SET plugin='mysql_native_password' WHERE User='test1' and host='localhost';
FLUSH PRIVILEGES;看完以上关于mysql迁移时经常会出现的有哪些错误，很多读者朋友肯定多少有一定的了解，如需获取更多的行业知识信息 ，可以持续关注我们的行业资讯栏目的。
