Vamsi Meka enhanced observability in the apache/phoenix repository by implementing query plan logging within the ConnectionActivityLogger. Using Java and leveraging backend development and configuration management skills, Vamsi introduced a new configuration property that enables detailed logging of query plan information, including region locations and hostnames for executed queries. This addition supports more effective debugging and performance analysis by providing deeper visibility into query execution paths. The work focused on improving system transparency and reducing mean time to resolution for incidents, demonstrating a solid understanding of database internals and logging practices. The feature was delivered as a well-scoped, targeted improvement.