DTP supports multiple layers of configuration for JVM-related settings. Administrators can control memory options and additional options by overriding default options in a configuration file or via environment variables.

Configuration Layers

There are three configuration layers, listed here in ascending order of precedence.

Default Configuration File

Location: <INSTALL_DIR>/bin/variables

This file is shipped with the product and contains the baseline JVM settings. It defines:

• JAVA_MEM (memory allocation for DTP server)
• JAVA_DC_MEM (memory allocation for Data Collector)

These values are applied unless overridden in a user configuration file or environment variables.

User Configuration File (Persistent Storage)

Location: <DATA_DIR>/conf/custom_variables

You can override the default values by defining any of the following variables in this file:

• JAVA_MEM
• JAVA_DC_MEM
• JAVA_CONFIG_ARGS (to enable options in DTP server)
• JAVA_DC_CONFIG_ARGS (to enable options in Data Collector)

These values will be applied unless overridden by environment variables.

Environment Variables

You can also define the following as environment variables:

• JAVA_MEM
• JAVA_DC_MEM
• JAVA_CONFIG_ARGS
• JAVA_DC_CONFIG_ARGS

Environment variables take precedence over both the user configuration file and the default configuration file; if an environment variable is defined, its value will be used regardless of what is set in either configuration file.