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The pool hit rate should be 1000/1000 if not the pool size is too short.

InnoDB Log File Size (innodb_log_file_size)

Purpose

Controls the size of InnoDB redo logs.

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• A larger size improves transaction commit speed but increases recovery time after crashes.

InnoDB Flush Log at Transaction Commit (innodb_flush_log_at_trx_commit)

Purpose

• Controls when logs are written to disk.

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• 1 ensures durability but adds disk overhead.

• 2 improves performance without major data loss risks.

InnoDB I/O Capacity (innodb_io_capacity)

Purpose

• Determines how many IOPS InnoDB can perform for background tasks (flushing dirty pages, index merges, etc.).

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