InnoDB

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wikipedia:InnoDB is a storage engine for the database management system MySQL and MariaDB. Is the default engine since MariaDB 10.2 (2016).

InnoDB supports:

• Both SQL and XA transactions
• Tablespaces
• Foreign keys
• Full text search indexes, since MySQL 5.6 (February 2013) and MariaDB 10.0)
• Spatial operations, following the OpenGIS standard
• Virtual columns, in MariaDB
• Page compression

Activities

• Show database engine:

  show table status like '<table name>';

Related commands

• mariadbcheck, can checked InnoDB tables with CHECK TABLE, but not repaired them with REPAIR TABLE
• show table status
• SHOW PROCESSLIST;
• show table status where name = "YOUR_TABLE_NAME" (Includes engine type)

SELECT TABLE_NAME,
      ENGINE
FROM   information_schema.TABLES
WHERE  TABLE_SCHEMA = 'dbname';

Errors

/var/log/mysql/error.log (MariaDB)
2022-12-15 19:18:32 0 [ERROR] InnoDB: preallocating 12582912 bytes for file ./ibtmp1 failed with error 28
2022-12-15 19:18:32 0 [ERROR] InnoDB: Could not set the file size of './ibtmp1'. Probably out of disk space
2022-12-15 19:18:32 0 [ERROR] InnoDB: Unable to create the shared innodb_temporary
2022-12-15 19:18:32 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2022-12-15 19:18:37 0 [ERROR] Plugin 'InnoDB' init function returned error.
2022-12-15 19:18:37 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2022-12-15 19:18:37 0 [ERROR] Unknown/unsupported storage engine: InnoDB
2022-12-15 19:18:37 0 [ERROR] Aborting
2022-12-15 19:21:06 35 [ERROR] mysqld: Table './xxxxx/searchindex' is marked as crashed and should be repaired

Activities

1. Read InnoDB Recovery Modes https://mariadb.com/kb/en/innodb-recovery-modes/

See also

• InnoDB, InnoDB purge worker
• MariaDB: mariadbcheck, mariabackup, mysqldump, MyRocks, show (MariaDB) MariaDB Changelog, 50-server.cnf, MariaDB engines, .ibd, .myd, .myi, /var/log/mysql/error.log, MariaDB files: .frm, .ibd, /etc/mysql/mariadb.conf.d/50-server.cnf, replication, MariaDB slow queries, show databases;, Aria, MyISAM, MariaDB SkySQL, binary log, 3306
• Databases: Database management, SQL, NoSQL, Wide column, PostgreSQL, MariaDB, MySQL, Derby DB, MongoDB, Cassandra, SQLite, HSQL2, H2, RocksDB, Microsoft SQL Server, DB2, Oracle Database, Memcached, Berkeley DB, Collation, SingleStore, Amazon Aurora, Graph database, Amazon DynamoDB, PrestoDB, Cache hit ratio, ACID, WAL, ARIES, DBMS, OLTP, OLAP, Database Schema, CockroachDB, Tables, Views, Apache Druid

https://mariadb.com/kb/en/innodb-page-compression/