OptionalchainOptionalhealthWhat the host already knows about itself, handed to BootSelfTest.
Every key is a host fact, so passing them in lets the unit run with no Drupal kernel.
OptionalhookOptionalhooksOptionalidleOptionalincludethe advisory scan unit; off only for a test that is measuring something else
OptionalincludeOptionalincludethe update-fetch reopen unit; off only for a test that is measuring something else
Optionalincludethe PHP health unit; off only for a test that is measuring something else
OptionalincludeOptionalmaxOptionalmaxOptionalnowOptionaloriginThe scheme://host[:port] a cron fragment boots Drupal against.
Cron sends mail and user_pass_reset_url() builds an absolute link from the request, so the
default would point every mailed link at the recipient's own machine. Empty keeps that
default, which is right for a probe.
OptionalpassOptionalqueueOptionalrowOptionaltables
every knob the GC passes and the chain accept; each reads only what it needs