innodb_checksum_algorithm
WARNING
Rule IDs: io_009
Overview
- Purpose
- Documented in the MySQL 8.4 manual as a server system variable (scope: Global). Purpose and semantics are described at the linked manual page.
- Dynamic (MySQL 8.4 reference)
- MySQL 8.4 marks this variable as dynamic (
Dynamic= Yes). Runtime changes useSET GLOBAL(global scope) orSET SESSION(session scope) — confirm syntax and persistence (SET PERSIST) in the manual. - Default value
- crc32 (MySQL 8.4)
- Version and product notes
- MariaDB and Percona Server may use different names, defaults, or dynamic behavior; verify their documentation.
- Documentation
- https://dev.mysql.com/doc/refman/8.4/en/innodb-parameters.html#sysvar_innodb_checksum_algorithm
- Other vendors
What is checked
Rules that reference this variable, with their severity and what each rule detects:
- WARNING
io_009: Set innodb_checksum_algorithm to crc32 (default in 8.0). Never disable checksums in production.
Tuning guidance
- Recommended actions:
- Set innodb_checksum_algorithm to crc32 (default in 8.0). Never disable checksums in production.
- Trade-offs: Higher I/O capacity values push more writes to disk, reducing lag and crash recovery time, but can saturate storage on spinning disks. Match settings to your storage hardware (SSD vs HDD).
Example
Consult the manual for whether SET GLOBAL, SET PERSIST, or SET SESSION applies.