WoundDie: Concurrency Control Protocol with Lightweight Priority Control

Recent concurrency control protocols for database transactions employ priority control to deliver predictable latency. Conventional protocols either require complex data structures or provide incomplete priority control that has a parameter and does not ensure starvation-freedom. To address this issue, we propose a new protocol, WoundDie, which ensures starvation-freedom without parameters. Unlike conventional starvation-free protocols, it does not require complex data structures for locking, making it memory-efficient and easy to implement. Experimental results demonstrated that under a high contention workload, WoundDie exhibited tail latency that was 6.5 times lower than Polaris's best case and 80 times lower than its worst case.