mysql 5.5.42升级到5.6.24步骤

一、第一步：
    首先找到5.6的yum源头；
    wget http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm
    rpm -ivh mysql-community-release-el6-5.noarch.rpm 
    yum -y update mysql-server
二、mysql5.6与mysql5.5的不一样之处以下：
   mysql  5.6会多五张表，分别为：slave_master_info
                                                slave_relay_log_info
                                                slave_worker_info
                                                innodb_index_stats
                                                innodb_table_stats
    重启mysql 
三、检查和执行mysql 数据库表操做：
    运行以下命令：
     mysql_upgrade -uroot -h192.168.30.167 -p
    输入密码便可；
   若是这个地方执行不下去，可依次执行以下语句，逐条进行排错：
    mysqlcheck --all-databases --check-upgrade --auto-repair
     mysql < fix_priv_tables
    mysqlcheck --all-databases --check-upgrade --fix-db-names --fix-table-names
  这步都ok以后，可尝试进行第五步操做。
四、重启mysqld，登录进行验证；看这五张表是否存在，或者查看mysqld的错误日志，看其是否报错；

五、若是报错，可登录mysql；使用以下语句建表：
    一、innodb_index_stats

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CREATE TABLE IF NOT EXISTS innodb_index_stats (     database_name           VARCHAR(64) NOT NULL,     table_name          VARCHAR(64) NOT NULL,     index_name          VARCHAR(64) NOT NULL,     last_update         TIMESTAMP NOT NULL NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,     /* there are at least:     stat_name='size'     stat_name='n_leaf_pages'     stat_name='n_diff_pfx%' */     stat_name           VARCHAR(64) NOT NULL,     stat_value          BIGINT UNSIGNED NOT NULL,     sample_size         BIGINT UNSIGNED,     stat_description        VARCHAR(1024) NOT NULL,     PRIMARY KEY (database_name, table_name, index_name, stat_name) ) ENGINE=INNODB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0

二、inndb_table_stats

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CREATE TABLE IF NOT EXISTS innodb_table_stats (     database_name           VARCHAR(64) NOT NULL,     table_name          VARCHAR(64) NOT NULL,     last_update         TIMESTAMP NOT NULL NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,     n_rows              BIGINT UNSIGNED NOT NULL,     clustered_index_size        BIGINT UNSIGNED NOT NULL,     sum_of_other_index_sizes    BIGINT UNSIGNED NOT NULL,     PRIMARY KEY (database_name, table_name) ) ENGINE=INNODB

三、 slave_master_info;     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' | 四、slave_worker_info  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' 五、 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' 六、确保上面五张表都正确以后，重启数据库，就不会再有报错信息出现。