Where to start when troubleshooting an Elasticsearch cluster? Is your cluster down, or experiencing degraded performance? Did it fail to upgrade? A well-configured Elasticsearch installation is able to better utilize available resources and respond more efficiently to requests. Join this talk if you want to learn the tools available to help you out (Elasticsearch REST APIs, log analysis, monitoring) and how to prevent the most common issues we see in Elastic support, with the recommended best practices to avoid them.