When Does MySQL Actually Update Index Blocks? A Deep Dive into InnoDB Update Mechanics

This article examines how MySQL InnoDB decides whether to modify index blocks during UPDATE statements, walks through the internal mysql_update workflow, shows debugging with GDB, explains three test scenarios, and validates the behavior by inspecting block LSNs with the innblock tool.

Database InternalsIndex UpdateInnoDB

0 likes · 18 min read

When Does MySQL Actually Update Index Blocks? A Deep Dive into InnoDB Update Mechanics