Where are the Drupal performance settings stored in the database?

Question

I'm trying to find where in the database (tablename.fieldname) the settings such as "Caching mode" that appear on the Performance settings screen (/admin/settings/performance) are stored.

I've looked in the cache* tables, system, variable and performance* tables.

Answer 1

These fields are in the "variables" table. You have to save the settings screen at least once for variables to appear.

Answer 2

In the file modules/system/system.admin.inc, inside the function system_performance_settings you can see how the "Performance settings" form is created. Check the #default attributes: there are calls to variable_get, so some settings are stored in the variables table.