On April 28, 2026, we released version 2.0.3 of our Kieker observability framework for application performance monitoring and dynamic software analysis.

We release all Kieker libraries via Maven repositories. Information on repositories and downloads are available at https://kieker-monitoring.net/download/ and the source code release is available at https://github.com/kieker-monitoring/kieker/releases/tag/2.0.3.

• Kieker uses Java 17 by default, and support Java 23
• We disabled logging timestamp in the default configuration
• We incorporated the new Maven publishing model
• Minor fixes and additions to the readthedocs documentation
• Delete empty tool runtime-analysis
• Remove unused lombok
• Replace jacoco Jenkins plugin by new plugin
• Update to AspectJ 1.9.23 at runtime
• Update gradle wrapper to 8.14.4
• Update to ByteBuddy 1.18.8
• Update AspectJ to 1.9.25.1
• Dependency updates

We are pleased to share our new publication “Benchmarking the Overhead of Distributed Tracing Agents” (https://doi.org/10.1145/3777884.3797004, preprint) in the proceedings of 17th ACM/SPEC International Conference on Performance Engineering (homepage). We used MooBench to measure and compare the overhead of distributed tracing agents, and Kieker’s Java agent has shown 1.38 us (Binary file) and 1.55 us (Binary TCP), which incur the minimum overhead among the compared tracing agents. Our root cause analysis using flamegraph has revealed which method calls are responsible to the overhead.

The 16th Symposium on Software Performance (SSP ’25) was held from November 3 to 5, 2025 in Kiel, Germany, which is now the second time SSP held in Kiel since 2016.

Every year, the SSP brings together researchers and practitioners interested in software performance and related quality attributes. The scope of SSP spans measurement, modeling, benchmark design, and run-time management.

The Kieker Observability Framework Version 2 is now available on the SPEC RG Tools repository. Lots of thanks to all Kieker developers and contributors from communities who made the new release possible!

On Thursday, February 13, 2025, the project members of SustainKieker gathered for the Kickoff meeting, early in the morning with unusal snow in Kiel. We discussed all project modules and caught up with the current progress.

SustainKieker is a DFG project, a colloboration of international universities, focusing on the reusability and sustainability of the Kieker Observability Framework.

The 15th Symposium on Software Performance (SSP ’24) was held from November 5 to 7, 2024 in Linz, Austria. It was the first edition of the SSP series that took place outside Germany.

Every year, the SSP brings together researchers and practitioners interested in software performance and related quality attributes. The scope of SSP spans measurement, modeling, benchmark design, and run-time management.