
select count(*) tup_per_page from test group by (ctid::text::point)[0] order by count(*) desc limit 5;
 tup_per_page 
--------------
           65
           65
           65
           65
           65
(5 rows)

effective_io_concurrency=0; id between 0 and 100000; Execution time: 524.671 ms
effective_io_concurrency=1; id between 0 and 100000; Execution time: 420.000 ms
effective_io_concurrency=0; id between 0 and 100000; Execution time: 441.813 ms
effective_io_concurrency=1; id between 0 and 100000; Execution time: 498.591 ms
effective_io_concurrency=0; id between 0 and 100000; Execution time: 662.838 ms
effective_io_concurrency=1; id between 0 and 100000; Execution time: 431.503 ms

effective_io_concurrency=0; id between 10 and 100000; Execution time: 1210.436 ms
effective_io_concurrency=1; id between 10 and 100000; Execution time: 1056.646 ms
effective_io_concurrency=0; id between 10 and 100000; Execution time: 578.102 ms
effective_io_concurrency=1; id between 10 and 100000; Execution time: 396.996 ms
effective_io_concurrency=0; id between 10 and 100000; Execution time: 598.842 ms
effective_io_concurrency=1; id between 10 and 100000; Execution time: 555.258 ms

effective_io_concurrency=0; id between 50 and 100000; Execution time: 4017.999 ms
effective_io_concurrency=1; id between 50 and 100000; Execution time: 383.694 ms
effective_io_concurrency=0; id between 50 and 100000; Execution time: 535.686 ms
effective_io_concurrency=1; id between 50 and 100000; Execution time: 570.221 ms
effective_io_concurrency=0; id between 50 and 100000; Execution time: 852.960 ms
effective_io_concurrency=1; id between 50 and 100000; Execution time: 656.097 ms

effective_io_concurrency=0; id between 64 and 100000; Execution time: 385.628 ms
effective_io_concurrency=1; id between 64 and 100000; Execution time: 712.261 ms
effective_io_concurrency=0; id between 64 and 100000; Execution time: 1610.618 ms
effective_io_concurrency=1; id between 64 and 100000; Execution time: 438.211 ms
effective_io_concurrency=0; id between 64 and 100000; Execution time: 393.341 ms
effective_io_concurrency=1; id between 64 and 100000; Execution time: 744.768 ms

effective_io_concurrency=0; id between 65 and 100000; Execution time: 846.759 ms
effective_io_concurrency=1; id between 65 and 100000; Execution time: 514.668 ms
effective_io_concurrency=0; id between 65 and 100000; Execution time: 536.640 ms
effective_io_concurrency=1; id between 65 and 100000; Execution time: 461.966 ms
effective_io_concurrency=0; id between 65 and 100000; Execution time: 1810.677 ms
effective_io_concurrency=1; id between 65 and 100000; Execution time: 545.359 ms

effective_io_concurrency=0; id between 66 and 100000; Execution time: 663.920 ms
effective_io_concurrency=1; id between 66 and 100000; Execution time: 5571.118 ms
effective_io_concurrency=0; id between 66 and 100000; Execution time: 683.056 ms
effective_io_concurrency=1; id between 66 and 100000; Execution time: 5883.359 ms
effective_io_concurrency=0; id between 66 and 100000; Execution time: 472.809 ms
effective_io_concurrency=1; id between 66 and 100000; Execution time: 5461.794 ms

effective_io_concurrency=0; id between 100 and 100000; Execution time: 647.292 ms
effective_io_concurrency=1; id between 100 and 100000; Execution time: 7810.344 ms
effective_io_concurrency=0; id between 100 and 100000; Execution time: 773.750 ms
effective_io_concurrency=1; id between 100 and 100000; Execution time: 5637.014 ms
effective_io_concurrency=0; id between 100 and 100000; Execution time: 726.111 ms
effective_io_concurrency=1; id between 100 and 100000; Execution time: 7740.607 ms

effective_io_concurrency=0; id between 200 and 100000; Execution time: 549.281 ms
effective_io_concurrency=1; id between 200 and 100000; Execution time: 5032.522 ms
effective_io_concurrency=0; id between 200 and 100000; Execution time: 692.631 ms
effective_io_concurrency=1; id between 200 and 100000; Execution time: 5138.669 ms
effective_io_concurrency=0; id between 200 and 100000; Execution time: 793.342 ms
effective_io_concurrency=1; id between 200 and 100000; Execution time: 5375.822 ms

effective_io_concurrency=0; id between 1000 and 100000; Execution time: 596.754 ms
effective_io_concurrency=1; id between 1000 and 100000; Execution time: 5278.683 ms
effective_io_concurrency=0; id between 1000 and 100000; Execution time: 638.706 ms
effective_io_concurrency=1; id between 1000 and 100000; Execution time: 5404.002 ms
effective_io_concurrency=0; id between 1000 and 100000; Execution time: 730.667 ms
effective_io_concurrency=1; id between 1000 and 100000; Execution time: 5761.312 ms

effective_io_concurrency=0; id between 2000 and 100000; Execution time: 656.086 ms
effective_io_concurrency=1; id between 2000 and 100000; Execution time: 6156.003 ms
effective_io_concurrency=0; id between 2000 and 100000; Execution time: 768.288 ms
effective_io_concurrency=1; id between 2000 and 100000; Execution time: 4917.423 ms
effective_io_concurrency=0; id between 2000 and 100000; Execution time: 500.931 ms
effective_io_concurrency=1; id between 2000 and 100000; Execution time: 5659.255 ms

effective_io_concurrency=0; id between 5000 and 100000; Execution time: 755.440 ms
effective_io_concurrency=1; id between 5000 and 100000; Execution time: 5141.671 ms
effective_io_concurrency=0; id between 5000 and 100000; Execution time: 542.174 ms
effective_io_concurrency=1; id between 5000 and 100000; Execution time: 6074.953 ms
effective_io_concurrency=0; id between 5000 and 100000; Execution time: 570.615 ms
effective_io_concurrency=1; id between 5000 and 100000; Execution time: 6922.402 ms

effective_io_concurrency=0; id between 10000 and 100000; Execution time: 469.544 ms
effective_io_concurrency=1; id between 10000 and 100000; Execution time: 6083.361 ms
effective_io_concurrency=0; id between 10000 and 100000; Execution time: 706.078 ms
effective_io_concurrency=1; id between 10000 and 100000; Execution time: 4069.171 ms
effective_io_concurrency=0; id between 10000 and 100000; Execution time: 526.792 ms
effective_io_concurrency=1; id between 10000 and 100000; Execution time: 5289.984 ms

effective_io_concurrency=0; id between 20000 and 100000; Execution time: 435.503 ms
effective_io_concurrency=1; id between 20000 and 100000; Execution time: 5460.730 ms
effective_io_concurrency=0; id between 20000 and 100000; Execution time: 454.323 ms
effective_io_concurrency=1; id between 20000 and 100000; Execution time: 4163.030 ms
effective_io_concurrency=0; id between 20000 and 100000; Execution time: 674.382 ms
effective_io_concurrency=1; id between 20000 and 100000; Execution time: 3703.045 ms

effective_io_concurrency=0; id between 50000 and 100000; Execution time: 226.094 ms
effective_io_concurrency=1; id between 50000 and 100000; Execution time: 2584.720 ms
effective_io_concurrency=0; id between 50000 and 100000; Execution time: 1431.037 ms
effective_io_concurrency=1; id between 50000 and 100000; Execution time: 2651.834 ms
effective_io_concurrency=0; id between 50000 and 100000; Execution time: 345.194 ms
effective_io_concurrency=1; id between 50000 and 100000; Execution time: 2328.844 ms

effective_io_concurrency=0; id between 75000 and 100000; Execution time: 120.121 ms
effective_io_concurrency=1; id between 75000 and 100000; Execution time: 2125.927 ms
effective_io_concurrency=0; id between 75000 and 100000; Execution time: 115.865 ms
effective_io_concurrency=1; id between 75000 and 100000; Execution time: 1616.534 ms
effective_io_concurrency=0; id between 75000 and 100000; Execution time: 138.005 ms
effective_io_concurrency=1; id between 75000 and 100000; Execution time: 1651.880 ms

effective_io_concurrency=0; id between 90000 and 100000; Execution time: 66.322 ms
effective_io_concurrency=1; id between 90000 and 100000; Execution time: 443.317 ms
effective_io_concurrency=0; id between 90000 and 100000; Execution time: 53.138 ms
effective_io_concurrency=1; id between 90000 and 100000; Execution time: 566.945 ms
effective_io_concurrency=0; id between 90000 and 100000; Execution time: 57.441 ms
effective_io_concurrency=1; id between 90000 and 100000; Execution time: 525.749 ms

