Worked on the MystenLabs/sui repository to address a concurrency issue in the DBMetrics initialization process. By replacing the unsafe Once.get().unwrap() pattern with the thread-safe get_or_init() method, the update eliminated a race condition that could lead to panics during metric collection. This change also removed test registry overwrite warnings, enhancing both reliability and observability in the system. The work focused on improving the robustness of metric initialization using Rust, with an emphasis on systems programming and safe concurrency practices. The contribution reduced operational risk and ensured more predictable behavior in multi-threaded environments without introducing new features.