Created
August 19, 2023 08:55
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| explain (analyze,buffers) | |
| select count(1) | |
| from bigtable | |
| QUERY PLAN | | |
| ----------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | |
| Finalize Aggregate (cost=254096.62..254096.65 rows=1 width=8) (actual time=9956.068..9976.581 rows=1 loops=1) | | |
| Buffers: shared hit=158026 read=25297 dirtied=1871 | | |
| I/O Timings: shared/local read=23218.641 | | |
| -> Gather (cost=254096.38..254096.61 rows=2 width=8) (actual time=9956.062..9976.576 rows=3 loops=1) | | |
| Workers Planned: 2 | | |
| Workers Launched: 2 | | |
| Buffers: shared hit=158026 read=25297 dirtied=1871 | | |
| I/O Timings: shared/local read=23218.641 | | |
| -> Partial Aggregate (cost=253096.38..253096.41 rows=1 width=8) (actual time=9799.502..9799.504 rows=1 loops=3) | | |
| Buffers: shared hit=158026 read=25297 dirtied=1871 | | |
| I/O Timings: shared/local read=23218.641 | | |
| -> Parallel Index Only Scan using pk_bigtable on bigtable (cost=0.43..242209.49 rows=4354757 width=0) (actual time=0.074..9614.699 rows=3484407 loops=3)| | |
| Heap Fetches: 1187525 | | |
| Buffers: shared hit=158026 read=25297 dirtied=1871 | | |
| I/O Timings: shared/local read=23218.641 | | |
| Planning Time: 0.080 ms | | |
| Execution Time: 9976.629 ms | |
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