innodb_log_buffer_size
WARNING
Rule IDs: rl_004
Overview
- Purpose
- Configuration or diagnostic item referenced in tuning reviews. It may be vendor-specific, renamed between versions, or not present in the bundled MySQL 8.4 summary table under this exact name.
- Dynamic (MySQL 8.4 reference)
- Not found in the bundled MySQL 8.4 variable summary extract under
innodb_log_buffer_size. Do not assume it is dynamic orSET GLOBAL-able — open the manual for your exact product and version. - Default value
- See vendor documentation.
- Version and product notes
- Compare MySQL, MariaDB, and Percona Server manuals; names changed across releases (for example replication terminology).
- Documentation
- https://dev.mysql.com/doc/refman/8.4/en/server-system-variable-reference.html
- Other vendors
What is checked
Rules that reference this variable, with their severity and what each rule detects:
- WARNING
rl_004: Increase innodb_log_buffer_size. Ensure it is large enough to hold transaction data before flushing to disk.
Tuning guidance
- Recommended actions:
- Increase innodb_log_buffer_size. Ensure it is large enough to hold transaction data before flushing to disk.
- Trade-offs: Larger redo logs reduce checkpoint frequency and improve write throughput, but increase crash recovery time. Durability settings (flush_log_at_trx_commit) trade performance for crash safety.
Example
Look up this name (and synonyms) in vendor documentation before changing anything in production.