Created
February 15, 2018 12:08
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| QUERY PLAN | |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | |
| Limit (cost=98624.84..98624.96 rows=10 width=74) (actual time=0.130..0.130 rows=0 loops=1) | |
| Buffers: shared hit=3 | |
| -> Sort (cost=98624.84..99874.84 rows=500000 width=74) (actual time=0.119..0.119 rows=0 loops=1) | |
| Sort Key: posts.id DESC | |
| Sort Method: quicksort Memory: 25kB | |
| Buffers: shared hit=3 | |
| -> Hash Join (cost=17.92..29077.92 rows=500000 width=74) (actual time=0.104..0.104 rows=0 loops=1) | |
| Hash Cond: (posts.user_id = users.id) | |
| Buffers: shared hit=3 | |
| -> Seq Scan on posts (cost=0.00..20310.00 rows=1000000 width=49) (actual time=0.015..0.015 rows=1 loops=1) | |
| Buffers: shared hit=1 | |
| -> Hash (cost=17.29..17.29 rows=50 width=49) (actual time=0.069..0.069 rows=0 loops=1) | |
| Buckets: 1024 Batches: 1 Memory Usage: 8kB | |
| Buffers: shared hit=2 | |
| -> Hash Join (cost=14.88..17.29 rows=50 width=49) (actual time=0.059..0.059 rows=0 loops=1) | |
| Hash Cond: (users.id = friends.friend_user_id) | |
| Buffers: shared hit=2 | |
| -> Seq Scan on users (cost=0.00..2.00 rows=100 width=41) (actual time=0.010..0.010 rows=1 loops=1) | |
| Buffers: shared hit=1 | |
| -> Hash (cost=14.76..14.76 rows=9 width=8) (actual time=0.029..0.029 rows=0 loops=1) | |
| Buckets: 1024 Batches: 1 Memory Usage: 8kB | |
| Buffers: shared hit=1 | |
| -> Bitmap Heap Scan on friends (cost=4.22..14.76 rows=9 width=8) (actual time=0.019..0.019 rows=0 loops=1) | |
| Recheck Cond: (user_id = 2) | |
| Buffers: shared hit=1 | |
| -> Bitmap Index Scan on friends_user_id_friend_user_id_key (cost=0.00..4.22 rows=9 width=0) (actual time=0.010..0.010 rows=0 loops=1) | |
| Index Cond: (user_id = 2) | |
| Buffers: shared hit=1 | |
| Planning time: 0.542 ms | |
| Execution time: 0.184 ms | |
| (30 rows) |
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