One of the roles I have at Sematext is #Solr consultancy and training. Given that I decided to spend some time to share the knowledge about how to Monitor Apache Solr in production.
We also decided that it would be good to release that content as an eBook that you can download and have with you whenever you need it. Here it is - the official download link for Solr Monitoring - The Complete Guide.
Feel free to reach out in the comments or through various social media channels if you have any questions, suggestions or comments!