Logging Foreign Key errors

In the last blog post I wrote about how to log deadlock errors using Percona Toolkit. Foreign key errors have the same problems. InnoDB only logs the last error in the output of SHOW ENGINE INNODB STATUS, so we need another similar tool in order to have historical data.

pt-fk-error-logger

This is a tool very similar to pt-deadlock-logger that will help us to log those errors. It can log them to a table, file or just show them on STDOUT. Let’s see how to use it:

1- Create the table

First we create the table where we are going to store the information: