What should I do if the InnoDB engine is disabled when MySQL starts?
What should I do if the InnoDB engine is disabled when MySQL starts? Recently I encountered a problem at work, and now I will share the solution for everyone’s reference and study. The following article mainly introduces to you the solution to the problem that the InnoDB engine is disabled when MySQL is started. Friends who need it can follow the steps below. Let’s learn together. Hope it helps everyone.
Discover the problem
Today at work, when copying table data from the local database to the database on the virtual machine CentOS 6.6, I got the prompt:
Unknown table engine 'InnoDB'
So in the server MySQL Checked the engine:
mysql> show engines\G
Got:
*************************** 1. row *************************** Engine: MyISAM Support: DEFAULT Comment: MyISAM storage engine Transactions: NO XA: NO Savepoints: NO *************************** 2. row *************************** Engine: CSV Support: YES Comment: CSV storage engine Transactions: NO XA: NO Savepoints: NO *************************** 3. row *************************** Engine: MEMORY Support: YES Comment: Hash based, stored in memory, useful for temporary tables Transactions: NO XA: NO Savepoints: NO *************************** 4. row *************************** Engine: BLACKHOLE Support: YES Comment: /dev/null storage engine (anything you write to it disappears) Transactions: NO XA: NO Savepoints: NO *************************** 5. row *************************** Engine: MRG_MYISAM Support: YES Comment: Collection of identical MyISAM tables Transactions: NO XA: NO Savepoints: NO *************************** 6. row *************************** Engine: PERFORMANCE_SCHEMA Support: YES Comment: Performance Schema Transactions: NO XA: NO Savepoints: NO *************************** 7. row *************************** Engine: ARCHIVE Support: YES Comment: Archive storage engine Transactions: NO XA: NO Savepoints: NO *************************** 8. row *************************** Engine: FEDERATED Support: NO Comment: Federated MySQL storage engine Transactions: NULL XA: NULL Savepoints: NULL *************************** 9. row *************************** Engine: InnoDB Support: NO Comment: Supports transactions, row-level locking, and foreign keys Transactions: NULL XA: NULL Savepoints: NULL rows in set (0.00 sec)
Supports in InnoDB is NO
Solution
Edit my.cnf
[root@localhost mysql]# vim /etc/my.cnf
Change innodb = OFF to innodb = ON
At the same time, comment out skip-innodb.
Related recommendations:
Comparison between MySQL storage engine MyISAM and InnoDB
Introduction to innoDB lock in mysql
Detailed analysis of the differences between MySQL InnoDB and MyISAM data engines
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