Worked on the percona/percona-server repository to enhance stability and correctness in process visibility under concurrent workloads. Addressed a critical race condition in the I_S.processlist by implementing a caching mechanism for accessed information and ensuring that only the current thread’s protocol object was referenced. This approach, using C++ and leveraging expertise in concurrency control and database internals, prevented invalid memory access and reduced synchronization issues. The fix improved the reliability of the process list, lowered production risk, and made core server behavior easier to maintain. The work focused on debugging and race condition fixes, contributing to safer concurrent operations.