在安装MySQL 5.6.30时，安装完成后，后台日志报如下警告信息：
2016-05-27 12:25:27 7fabf86f7700 InnoDB: Error: Table "mysql"."innodb_table_stats" not found.
2016-05-27 12:25:27 7fabf86f7700 InnoDB: Error: Fetch of persistent statistics requested for table "hj_web"."wechat_res" but the required system tables mysql.innodb_table_stats and mysql.innodb_index_stats are not present or have unexpected structure. Using transient stats instead.
2016-05-27 14:03:52 28585 [Warning] InnoDB: Cannot open table mysql/slave_master_info from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.
2016-05-27 14:03:52 28585 [Warning] InnoDB: Cannot open table mysql/slave_relay_log_info from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.
2016-05-27 14:03:52 28585 [Warning] InnoDB: Cannot open table mysql/slave_worker_info from the internal data dictionary of InnoDB though the .frm file for the table exists. See http://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html for how you can resolve the problem.
The cause of the problem: the specific cause is unknown, the Internet to find information on: Open the default database engine which few tables for MyISAM, but this a few tables in the engine when construction of the table is INNODB
But can determine, this is indeed a few tables in the new mysql5.6 into the
innodb_index_stats,
innodb_tables_stats,
slave_master_info,
slave_relay_log_info,
slave_worker_info
Solution:
1, log database, enter the mysql database, execute the following SQL delete five tables
in mind that it must be the Table IF EXISTS drop
mysql> use mysql;
mysql> drop the Table IF EXISTS innodb_index_stats; mysql> drop the Table IF EXISTS innodb_table_stats; mysql > drop the table IF EXISTS slave_master_info; MySQL> drop the table IF EXISTS slave_relay_log_info; MySQL> drop the table IF EXISTS slave_worker_info; executed, can show tables look to see if the table's data has been reduced by more than previously deleted, if reduced, show that you succeeded!
2, after the previous step is complete, stop the database, and the database data into the file directory, delete the above five tables corresponding idb file as follows:
# /etc/init.d/mysqld stop
# cd /data/mysql/data/mysql/
# ls -l *.ibd
-rw-rw---- 1 mysql mysql 98304 May 27 14:17 innodb_index_stats.ibd
-rw-rw---- 1 mysql mysql 98304 May 27 14:17 innodb_table_stats.ibd
-rw-rw---- 1 mysql mysql 98304 May 27 14:14 slave_master_info.ibd
-rw-rw---- 1 mysql mysql 98304 May 27 14:14 slave_relay_log_info.ibd
-rw-rw---- 1 mysql mysql 98304 May 27 14:14 slave_worker_info.ibd
# /bin/rm -rf *.ibd
3, restart the database, enter the mysql database, rebuild above the deleted table structure:
to build the table script database in the share installation directory mysql software under or installation package script directory mysql, my mysql software installation path / data / mysql /
# /etc/init.d/mysqld start
mysql> use mysql;
mysql> source /data/mysql/share/mysql_system_tables.sql
mysql> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| event |
| func |
| general_log |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| innodb_index_stats |
| innodb_table_stats |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| proxies_priv |
| servers |
| slave_master_info |
| slave_relay_log_info |
| slave_worker_info |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
28 rows in set (0.00 sec)
mysql> desc innodb_table_stats;
+--------------------------+---------------------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+--------------------------+---------------------+------+-----+-------------------+-----------------------------+
| database_name | varchar(64) | NO | PRI | NULL | |
| table_name | varchar(64) | NO | PRI | NULL | |
| last_update | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
| n_rows | bigint(20) unsigned | NO | | NULL | |
| clustered_index_size | bigint(20) unsigned | NO | | NULL | |
| sum_of_other_index_sizes | bigint(20) unsigned | NO | | NULL | |
+--------------------------+---------------------+------+-----+-------------------+-----------------------------+
6 rows in set (0.00 sec)
mysql> desc slave_master_info;
+------------------------+---------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------------------+---------------------+------+-----+---------+-------+
| Number_of_lines | int(10) unsigned | NO | | NULL | |
| Master_log_name | text | NO | | NULL | |
| Master_log_pos | bigint(20) unsigned | NO | | NULL | |
| Host | char(64) | NO | PRI | | |
| User_name | text | YES | | NULL | |
| User_password | text | YES | | NULL | |
| Port | int(10) unsigned | NO | PRI | NULL | |
| Connect_retry | int(10) unsigned | NO | | NULL | |
| Enabled_ssl | tinyint(1) | NO | | NULL | |
| Ssl_ca | text | YES | | NULL | |
| Ssl_capath | text | YES | | NULL | |
| Ssl_cert | text | YES | | NULL | |
| Ssl_cipher | text | YES | | NULL | |
| Ssl_key | text | YES | | NULL | |
| Ssl_verify_server_cert | tinyint(1) | NO | | NULL | |
| Heartbeat | float | NO | | NULL | |
| Bind | text | YES | | NULL | |
| Ignored_server_ids | text | YES | | NULL | |
| Uuid | text | YES | | NULL | |
| Retry_count | bigint(20) unsigned | NO | | NULL | |
| Ssl_crl | text | YES | | NULL | |
| Ssl_crlpath | text | YES | | NULL | |
| Enabled_auto_position | tinyint(1) | NO | | NULL | |
+------------------------+---------------------+------+-----+---------+-------+
23 rows in set (0.00 sec)
说明表都正常了，再次查看mysql报错日志，就会发现没有了关于这5个表的报错日志。