4080
MariaDBERRORCommonHIGH confidence
InnoDB undo tablespace size is wrong
Production Risk
High — Incorrect undo tablespace size can prevent server startup or cause transaction failures.
Why it happens
- 1Undo tablespace file was manually modified or truncated.
- 2The innodb_undo_tablespaces or innodb_undo_log_truncate settings conflict with existing files.
- 3Disk failure or partial write left the undo file in an inconsistent state.
Fix 1
Check undo tablespace sizing parameters
Check undo tablespace sizing parameters
SHOW VARIABLES LIKE 'innodb_undo%';
Why this works
Verify innodb_undo_tablespaces and innodb_max_undo_log_size match the expected values.
Fix 2
Restore undo tablespace from backup
Why this works
If the file is corrupted, restore from a clean backup and restart the server.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 4080 ER_INNODB_UNDO_SPACE_SIZE_WRONG
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