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04f1013be0
On fast machines, it's possible for applications such as pgbench to issue connection requests so quickly that the postmaster's listen queue overflows in the kernel, resulting in unexpected failures (with not-very-helpful error messages). Most modern OSes allow the queue size to be increased, so document how to do that. Per report from Kevin McKibbin. Discussion: https://postgr.es/m/CADc_NKg2d+oZY9mg4DdQdoUcGzN2kOYXBu-3--RW_hEe0tUV=g@mail.gmail.com