Track Total Session Memory Usage

[gordan-bobic]

Add this metric to be polled and captured by mysqld_exporter:

SELECT SUM(memory_used) FROM information_schema.processlist;

This metric should be shown on the MySQL -> MySQL Overview -> MySQL Internal Memory Overview graph.

[oblitorum]

It seems the memory_used column only exists in MariaDB, not in MySQL 5.7/8.0. Anyway, I added that metric and it looks like this :

[gordan-bobic]

Looks good.