UFS is an eBPF unfair scheduler that improves time-sensitive task throughput by up to 2X and halves tail latency in mixed PostgreSQL workloads by limiting background tasks to idle capacity and using hints to prevent priority inversion.
Edward Suh, Kostis Kaffes, and Christina Delimitrou
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Unfair by design: eBPF-based scheduling of mixed database workloads
UFS is an eBPF unfair scheduler that improves time-sensitive task throughput by up to 2X and halves tail latency in mixed PostgreSQL workloads by limiting background tasks to idle capacity and using hints to prevent priority inversion.