Worked on enhancing memory management in the facebook/rocksdb repository by updating the MemTable’s fragmented range tombstone cache to use C++20’s atomic<shared_ptr> for improved thread safety and memory efficiency. The implementation included a C++17 fallback to ensure compatibility across different environments, addressing both current and future needs for concurrent workloads. Focused on reducing memory fragmentation and increasing throughput under high concurrency, the work leveraged advanced C++ features and concurrency techniques. This update laid the foundation for further C++20-based optimizations, demonstrating depth in memory management and cross-version support within a widely used storage engine codebase. No bugs were reported.