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When you hear Elasticsearch and logs, you probably assume we want to store some application or infrastructure logs in the Elastic Stack. But this talk focusses on the logs that Elasticsearch produces itself: How to configure and use server, slow, GC, deprecation, and audit logs.

We discuss log levels and hierarchies, the options for changing log levels in Elasticsearch, and where you can access them. Along with some tricks and best practices — for example are you already using X-Opaque-Id?

And of course we are going to store the logs in the Elastic Stack itself to close the loop.