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Configuring with Java System Properties

Configuration properties may be set using Java system properties on the IQ server start-up script. The property overrides start with the prefix dw. - followed by a dot-separated path to the configuration value being overridden.

Example Java Command Overriding baseUrl with System Properties
java -Ddw.baseUrl=http://iq.example.com -jar nexus-iq-server-*.jar server config.yml 2> stderr.log

Configuring maxConnections

You can configure the maxConnections setting by passing it as a Java system property. This gives you flexibility to adjust the database connection pool size dynamically without modifying the YAML file.

Use the Dropwizard configuration override syntax with the dw. prefix followed by the full path to the configuration property. In this case:

-Ddw.database.maxConnections=<desired_value>
Example 1. Example

To start the server with a maximum of 100 connections, run:

java -Ddw.database.maxConnections=100 -jar nexus-iq-server-*.jar server config.yml

This command will override the maxConnectionsvalue in your configuration at startup.



Version and Compatibility

  • This configuration option is available in IQ Server version 187 and later.

  • Make sure that your PostgreSQL server’s max_connections setting is higher than the value you configure here to prevent connection issues.

For maxConnections reference values, see Maximum Pool Size.