https://www.percona.com/blog/hot-column-addition-and-deletion-part-i-performance/
Hot Column Addition and Deletion Part I - Performance - Percona
May 4, 2026 - From 18 hours to 3 seconds! Hot Column Addition and Deletion (HCAD) Overview TokuDB v5.0 introduces several features that are new to the MySQL world. In this...
column additionhotdeletionpartperformance