Kedar
January 19, 2026

MySQL 8.4 changed the InnoDB adaptive hash index (innodb_adaptive_hash_index) default from ON to OFF, a major shift after years of it being enabled by default. Note that the MySQL adaptive hash index (AHI) feature remains fully available…

AWS RDS
MariaDB
MySQL
MySQL tools

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How to checksum on AWS RDS for MySQL Replication 8.0 > 8.4

Kedar
November 4, 2025

During a MySQL upgrade process the RDS replication between MySQL 8.0 and 8.4 was configured. I wanted to ensure the data was consistent for any random reason. This post is…

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MySQL
MySQL Upgrade

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A Unique Foreign Key issue in MySQL 8.4

Kedar
April 24, 2025

Recently, a friend reached out to me for help after encountering an error while restoring a MySQL dump during an upgrade from MySQL 8.0 to 8.4. The error read: At…

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