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Adjust Heap Size for Elasticsearch Service

Applies To​

Netwrix Directory Manager 11.1

Overview​

This article explains how to increase the Java heap size for the Elasticsearch service in Netwrix Directory Manager v11.1. Adjusting the heap size can improve search performance and help prevent memory-related issues.

Elasticsearch relies on allocated heap memory for storing and processing data. If the heap size is too small, it can cause performance degradation or service instability. Allocating too much memory can also negatively affect system resources.

Heap size settings are defined in the registry and control the minimum and maximum memory allocated to Elasticsearch:

  • -Xms: Initial heap size
  • -Xmx: Maximum heap size

It is recommended to set both values to the same amount to maintain performance consistency.

Instructions​

  1. Open the Registry Editor on the server running Elasticsearch.

  2. Navigate to the following registry path:
    HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Apache Software Foundation\Procrun 2.0\GroupIDElasticSearchService11\Parameters\Java

  3. Locate the parameters for heap size:

    • -Xms (Initial heap size)
    • -Xmx (Maximum heap size)

  4. Modify both values as needed. For example, to allocate 4 GB of memory:

    • -Xms4g
    • -Xmx4g

    NOTE: Make sure both Xms and Xmx values are the same.

  5. Registry Editor showing Xms and Xmx heap size parameters for Elasticsearch

  6. Close the Registry Editor after saving the changes.

  7. Restart the GroupIDElasticSearchService11 service for the changes to take effect.

NOTE: To restart the service, open Services (services.msc), locate GroupIDElasticSearchService11, right-click it, and select Restart.