Good point about SKIP LOCKED inefficiencies with mixed-duration jobs. In PGQueuers benchmarks, throughput reached up to 18k jobs/sec, showing it can handle high concurrency well. For mixed workloads, strategies like batching or partitioning by job type can help.

While a separate "running" table reduces skips, it adds complexity. SKIP LOCKED strikes a good balance for simplicity and performance in many use cases.

One known issue is that vacuum will become an issue if the load is persistent for longer periods leading to bloat.