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    Enterprise Distributed Application Service:Configure JVM and Tomcat parameters for applications in an ECS cluster

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    Enterprise Distributed Application Service:Configure JVM and Tomcat parameters for applications in an ECS cluster

    Last Updated:Jun 03, 2026

    Tune JVM and Tomcat parameters to improve performance, increase throughput, and reduce latency for applications deployed in EDAS ECS clusters.

    Configuration levels

    Parameters can be set at two levels:

    Level Scope
    Application Applies to all application instance groups.
    Application instance group Applies only to a specific group.

    Instance group settings take precedence over application settings. If a group has no custom settings, the application-level settings apply.

    Navigate to the configuration page

    All configuration tasks start from the same entry point.

    1. Log on to the EDAS console.

    2. In the left-side navigation pane, choose Application Management > Applications.

    3. In the top navigation bar, select a region.

    4. At the top of the Applications page, select a namespace from the Microservices Namespace drop-down list.

    5. Click the name of the application to manage.

    6. Open the configuration page at either the application or group level:

      • Application settings:

        In the Application Settings section of the Basic Information tab, configure JVM Parameters, Basic Information, or Mount Script.

      • Group settings:

        1. Click the Instance Information tab.

        2. Move the pointer over Group Settings next to the target group.

        3. Select JVM, Tomcat, or Mount Script from the Group Settings drop-down list.

    Configure JVM parameters

    1. In the Application Settings section of the Basic Information tab, click Edit next to JVM Parameters.

    2. Click Memory Configuration, Application, GC Policy, Tool, and Custom to configure the relevant parameters.

      Note

      If the built-in options do not meet your requirements, click Custom and enter values in the Custom Parameters field.For HSF applications, the JVM -D startup configuration parameters provide additional tuning options.

    3. Click Configure JVM Parameters to save.

    4. Restart the application to apply the JVM parameters.

    Configure Tomcat parameters

    1. In the Application Settings section, click Edit next to Application Settings to open the Tomcat configuration panel.

      Configure the following parameters:

      Parameter Description Default
      Application Port Tomcat listening port. Valid range: 1024--65535. Ports below 1024 require root permissions; container configuration requires only Admin permissions. Set the port to 1024 or higher. 8080
      Tomcat Context The application URL path. Context path options. --
      Maximum Threads Maximum connection pool size, mapped to maxThreads. Directly affects performance—adjust with care and seek professional guidance when necessary. 400
      Tomcat Encoding The character encoding format for Tomcat. Valid values: UTF-8, ISO-8859-1, GBK, GB2312. ISO-8859-1

    2. Click Configure Tomcat to save.

    Context path options

    The Tomcat Context parameter determines how the application is accessed:

    Option Custom path required? Resulting access path
    Package Name No The name of the WAR package.
    Root Directory No /
    Custom Yes -- specify a value in Custom Path. The value specified in Custom Path.

    If Tomcat Context is not configured, the access path defaults to the WAR package name.

    Modify application name and description

    1. In the Application Settings section, click Basic Information.

    2. Update the Application Name and Application Description fields.

    3. Click Modify to save.