                                                             QUERY PLAN                                                             
------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=594824.85..594824.86 rows=1 width=8) (actual time=2718.148..2718.149 rows=1.00 loops=1)
   Buffers: shared hit=538 read=344290
   I/O Timings: shared read=12.200
   ->  Seq Scan on large_table  (cost=0.00..544825.48 rows=19999748 width=0) (actual time=0.110..1613.037 rows=20000000.00 loops=1)
         Buffers: shared hit=538 read=344290
         I/O Timings: shared read=12.200
 Planning:
   Buffers: shared hit=50
 Planning Time: 0.237 ms
 Execution Time: 2718.212 ms
(10 rows)

                                                             QUERY PLAN                                                             
------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=594824.85..594824.86 rows=1 width=8) (actual time=2691.676..2691.677 rows=1.00 loops=1)
   Buffers: shared hit=632 read=344196
   I/O Timings: shared read=11.753
   ->  Seq Scan on large_table  (cost=0.00..544825.48 rows=19999748 width=0) (actual time=0.120..1544.408 rows=20000000.00 loops=1)
         Buffers: shared hit=632 read=344196
         I/O Timings: shared read=11.753
 Planning:
   Buffers: shared hit=50
 Planning Time: 0.282 ms
 Execution Time: 2691.739 ms
(10 rows)

                                                             QUERY PLAN                                                             
------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=594824.85..594824.86 rows=1 width=8) (actual time=3253.429..3253.430 rows=1.00 loops=1)
   Buffers: shared hit=726 read=344102
   I/O Timings: shared read=26.955
   ->  Seq Scan on large_table  (cost=0.00..544825.48 rows=19999748 width=0) (actual time=0.338..2047.694 rows=20000000.00 loops=1)
         Buffers: shared hit=726 read=344102
         I/O Timings: shared read=26.955
 Planning:
   Buffers: shared hit=50
 Planning Time: 0.735 ms
 Execution Time: 3253.613 ms
(10 rows)

                                                             QUERY PLAN                                                             
------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=594824.85..594824.86 rows=1 width=8) (actual time=3060.796..3060.797 rows=1.00 loops=1)
   Buffers: shared hit=820 read=344008
   I/O Timings: shared read=25.174
   ->  Seq Scan on large_table  (cost=0.00..544825.48 rows=19999748 width=0) (actual time=0.170..1950.851 rows=20000000.00 loops=1)
         Buffers: shared hit=820 read=344008
         I/O Timings: shared read=25.174
 Planning:
   Buffers: shared hit=50
 Planning Time: 0.229 ms
 Execution Time: 3060.852 ms
(10 rows)

                                                             QUERY PLAN                                                             
------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=594824.85..594824.86 rows=1 width=8) (actual time=2963.069..2963.071 rows=1.00 loops=1)
   Buffers: shared hit=914 read=343914
   I/O Timings: shared read=22.019
   ->  Seq Scan on large_table  (cost=0.00..544825.48 rows=19999748 width=0) (actual time=0.143..1867.230 rows=20000000.00 loops=1)
         Buffers: shared hit=914 read=343914
         I/O Timings: shared read=22.019
 Planning:
   Buffers: shared hit=50
 Planning Time: 0.413 ms
 Execution Time: 2963.142 ms
(10 rows)

