I've been testing a few different caching solutions in Moodle 2.6+ and I'm wondering if Moodle logs any cache 'errors' anywhere? Outside of Moodle we're able to monitor IOPS, bandwidth, total number of requests, server loads, etc. but I'm interested in Moodle specific errors such as how many times an item can't be created or can't be found.
For example, if:
$component = $cache->get('component');
returns a value of false is this recorded anywhere? I'm looking for live results that can be viewed when performing specific tasks, not the results from Plugins -> Caching -> Test Performance.