Worked on the facebook/rocksdb repository to enhance reliability and performance by delivering a feature that enables aborting long-running MySQL queries. This was achieved by implementing an abort check within the RocksDB yield hook, allowing the system to detect and terminate queries that exceed acceptable execution times. The approach focused on improving responsiveness and preventing operations from hanging under heavy workloads, thereby increasing overall service stability. The work involved end-to-end design and implementation using C++ with an emphasis on database management and performance optimization. The feature was fully integrated and committed, providing a traceable improvement to RocksDB’s query handling.