Jiho Kim enhanced memory management in the facebook/rocksdb repository by updating the MemTable’s fragmented range tombstone cache to use C++20’s atomic<shared_ptr>, with a C++17 fallback for compatibility. This change improved thread safety and memory efficiency, directly addressing concurrency and fragmentation challenges in high-throughput environments. By leveraging advanced C++ features and focusing on concurrency and memory management, Jiho laid the foundation for future C++20-based optimizations. The work demonstrated a deep understanding of both modern C++ standards and practical system requirements, resulting in a more stable and efficient memory management subsystem within RocksDB’s core data structures.