This document discusses asset performance management (APM) and how to use Druid for APM. It contains the following key points: 1. APM involves monitoring industrial assets like production lines, conveyor belts, and semiconductor manufacturing equipment to predict failures and perform preventative maintenance. 2. Druid is an open source analytics database that can be used with tools like Kafka, Flink, and Metatron for real-time health monitoring, analytics, and predictive maintenance of industrial assets. 3. The Metatron APM system powered by Druid allows users to configure asset templates, build data pipelines from IoT sensors to Druid, perform fault detection and prediction, and generate dashboards and