Analyze your Connext DDS system memory usage and detect memory leaks 

RTI Heap Analyzer is a debugging tool that allows you to visualize and analyze the memory used by the Connext DDS Pro Library in your application. With an easy-to-use interface, you will be able to understand how and where memory is being consumed.

This tool is undergoing final review and will be released in Q2 2021. 

Introduced in Connext DDS 5.3.0, heap memory snapshot files contain all of the current outstanding memory allocations made by the Connext Pro Library. These provide information to use in analyzing how your DDS application is using system memory. While helpful, the amount of information can be huge, often containing hundreds of thousands of allocations per file.

Heap Analyzer provides a streamlined way to view and analyze heap memory information, via a graphical and human-readable report that can be customized to focus on criteria that is important to you. With Heap Analyzer, you can focus on the information that matters by:

  • Analyzing all the heap snapshot files, generating aggregate measurement with inferred de-allocation information.
  • Graphically displaying the information using HTML reports containing tables and charts that are customizable with an XML-based configuration file.
  • Modifying the program to fit your requirements.
  • Distributing as open source to get information on how the data is being analyzed.

Heap Analyzer takes data directly from your Connext DDS application. You only need to decide when to take the heap memory snapshots which are stored as files on your system. Once you’ve taken a snapshot, you can analyze that data using Heap Analyzer according to your preferences.

The analysis process begins by parsing all the data files and merging the information into two aggregated data files. The first is a process-level summary of memory consumption, and the second data file is a record of the individual heap memory allocations (and de-allocations) made by the Connext Pro Library. After this, Heap Analyzer will use the configuration file to generate HTML reports.


Figure 1: Heap Analyzer simplifies the process of analyzing how your Connext DDS system uses memory. Instead of analyzing multiple files with up to millions of lines, it provides summary information reported in a human-readable way.


RTI Labs Project Type: Debugging tool

Maturity level: Prototype (under development)

Support: This is an experimental RTI product. As such, we only offer support through the RTI Community Forum, where fellow Connext DDS users and RTI engineers can help you. This project is provided as open source so you have access to all the code, which you can modify according to your own requirements. 

Along with questions you may have, we encourage you to post your feedback on the RTI Community Forum. 

Intent. RTI plans on future development for Heap Analyzer.

Feedback. Please provide feedback via the RTI Community forum.

Product Version Information. This is version 1.0.0, and will run on Connext DDS 5.3.0 and later versions.

Which platform(s) is it compatible with? You can use it on any platform that is able to run Gradle and Java, including Windows, Linux and Mac.

System requirements: Java 8 or later.

Product compatibility: RTI Connext DDS version 5.3.0 and later versions.


If you are interested in using the Heap Analyzer, the following content may also be of interest:

The RTI Developer Community Forum:

Next Steps

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