Linwb developed JVM memory metrics collection for the crossoverJie/starrocks repository, focusing on backend observability and system monitoring. They designed and implemented new C++ modules to gather JVM memory data, integrating this logic into the existing StarRocks metrics framework. The solution included a configuration option to enable or disable metrics collection, allowing for flexible performance management. By leveraging C++, Java, and JNI, Linwb ensured seamless communication between the JVM and backend services. This work enhanced StarRocks’ ability to diagnose incidents and plan capacity, demonstrating depth in backend development, metrics instrumentation, and configuration management, with a clear focus on maintainability and integration.