Elasticsearch Memory

Get an Elasticsearch Check-Up

Check if your ES issues are caused from misconfigured settings

2-min process

Perform an Elasticsearch Check Up (2 min process) 

Memory in Elasticsearch

What is it

Memory is one of the most critical resources to monitor in Elasticsearch. Elasticsearch runs on JVM and uses heap memory areas for query cache, request cache, accessing lucene segments and storing fielddata for aggregations and sorting.

Commos problems and important points
  • The most common error that arises in Elasticsearch is OutOfMemory error. This error comes when the node is not able to cope up with the required heap size space. To avoid this, you need to closely monitor the heap utilization and garbage collector performance.
  • As per the most up-to-date best practices you should not allocate more than 50 percent of total RAM to JVM heap size. Starting from Elasticsearch version 5.x onward this can be set using -Xms and -Xmx parameters inside jvm.options configuration file. The defaults are set to 1 GB for both minimum and maximum heap size.
  • The heap size should not set more than 31 GB in any case to avoid the poor garbage collection.

About Opster

Incorporating deep knowledge and broad history of Elasticsearch issues. Opster solution identifies and predicts root causes of Elasticsearch problems, provides recommendations and can automatically perform various actions to manage, troubleshoot and prevent issues

Learn more: Glossary | Blog| Troubleshooting guides

Need help with any Elasticsearch issue ? Contact Opster

Did this page help you?

Check your Elasticsearch Settings  


Click below to learn how to fix common problems related to these concepts
« Back to Index