Do I need InnoDB?

Do I need InnoDB?

In general for me the most important point is that InnoDB offers per row locking, while MyISAM does look per table. On big tables with a lot of writes this might make a big performance issue. On the otherhand MyISAM table have a easier file structure, copying and repairing table on file level is way easier.

How InnoDB crash recovery happens?

To recover from an unexpected MySQL server exit, the only requirement is to restart the MySQL server. InnoDB automatically checks the logs and performs a roll-forward of the database to the present. InnoDB automatically rolls back uncommitted transactions that were present at the time of the crash.

How to recover InnoDB corruption for MySQL?

Recovering from corrupted InnoDB tables

1. Step 1 – Bring up your database in recovery mode.
2. Step 2 – Check which tables are corrupted and make a list.
3. Step 3 – Backup and drop your corrupted tables.
4. Step 4 – Restart MySQL in normal mode.
5. Step 5 – Import backup .sql.
6. Step 6 – Change port and grab a beer.

How to find database stored in InnoDB with SQL?

Finding databases stored in InnoDB with SQL: SELECT table_schema FROM INFORMATION_SCHEMA.TABLES WHERE engine = ‘innodb’ group by table_schema; Drop all databases stored in InnoDB.

How to recover MySQL with corrupted InnoDB files?

InnoDB on MySQL server was corrupted. And it could be solved by removing database files and reload SQL data. Backup InnoDB files (i.e. ib*), I suggests backup whole /var/lib/mysql directory. Adding innodb_force_recovery = 4 to [mysqld] section at MySQL server config file (eg. /etc/mysql/mysql.conf.d/mysqld.cnf in Ubuntu 16.04)

When to use MyISAM instead of InnoDB?

1 MyISAM is easily used for creating and designing. Hence, it can be used by beginners. 2 In MyISAM, there is no complication involving foreign key relationship between tables. 3 This is faster as compared to InnoDB. 4 We can use it when we need minimal performance.