> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-troubleshooting.md).

# InnoDB Troubleshooting

- [InnoDB Troubleshooting Overview](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-troubleshooting/innodb-troubleshooting-overview.md): A starting point for diagnosing InnoDB issues, recommending checks on error logs, deadlocks, and table integrity using various tools.
- [InnoDB Data Dictionary Troubleshooting](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-troubleshooting/innodb-data-dictionary-troubleshooting.md): Learn how to resolve inconsistencies between the InnoDB internal data dictionary and the file system, such as orphan .frm or .ibd files.
- [InnoDB Recovery Modes](https://mariadb.com/docs/server/server-usage/storage-engines/innodb/innodb-troubleshooting/innodb-recovery-modes.md): Understand the different \`innodb\_force\_recovery\` levels, which allow you to start the server in read-only modes to recover data after a crash.


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