Book Image

Monitoring Elasticsearch

By : Dan Noble, Pulkit Agrawal, Mahmoud Lababidi
Book Image

Monitoring Elasticsearch

By: Dan Noble, Pulkit Agrawal, Mahmoud Lababidi

Overview of this book

ElasticSearch is a distributed search server similar to Apache Solr with a focus on large datasets, a schema-less setup, and high availability. This schema-free architecture allows ElasticSearch to index and search unstructured content, making it perfectly suited for both small projects and large big data warehouses with petabytes of unstructured data. This book is your toolkit to teach you how to keep your cluster in good health, and show you how to diagnose and treat unexpected issues along the way. You will start by getting introduced to ElasticSearch, and look at some common performance issues that pop up when using the system. You will then see how to install and configure ElasticSearch and the ElasticSearch monitoring plugins. Then, you will proceed to install and use the Marvel dashboard to monitor ElasticSearch. You will find out how to troubleshoot some of the common performance and reliability issues that come up when using ElasticSearch. Finally, you will analyze your cluster’s historical performance, and get to know how to get to the bottom of and recover from system failures. This book will guide you through several monitoring tools, and utilizes real-world cases and dilemmas faced when using ElasticSearch, showing you how to solve them simply, quickly, and cleanly.
Table of Contents (15 chapters)
Monitoring Elasticsearch
About the Author
About the Reviewers


Bigdesk is a tool to look into various JVM and operating-system level metrics about your cluster. If your cluster runs slowly or experiences unusual errors, Bigdesk is a good place to check for anything out of the ordinary.

After following the installation instructions from the previous chapter, access Bigdesk by visiting http://elasticsearch-node-01:9200/plugin/bigdesk/. The initial landing page looks like this:

Like Elasticsearch-head, this page shows the nodes in your cluster and the cluster health. Click on any of the nodes listed in the top row to display its individual metrics:

In this screenshot, we selected elasticsearch-node-02 and are looking at JVM metrics. A notable chart in this section is the Heap Mem figure. If you are using close to the maximum amount of committed heap memory, you will want to increase your heap memory by setting ES_HEAP_SIZE to at the most half of your total available memory.

Further down, we see operating system metrics, namely:

  • CPU usage

  • Memory usage...