Я получаю эту ошибку времени ожидания:
Сообщение: SQLSTATE [57014]: Запрос отменен: 7 ОШИБКА: отмена оператора из-за времени ожидания оператора
ЭтоТайм-аут запроса:
SELECT
log.id,
integration.id AS intid,
log.integration_id AS integration_id,
integration.name,
log.createddate
FROM integration log
LEFT JOIN integration__sf integration on ( integration.id = log.integration_id)
LEFT JOIN property prop on ( log.property_id = prop.id )
LEFT JOIN account acc on ( acc.sfid = integration.account )
WHERE
log.id IS NOT NULL
AND log.script_type = 'Pull'
AND log.script_name = 'ModifyTags'
AND log.createddate >= '2018-11-01 00:00:00'
AND log.createddate <= '2018-11-30 23:59:59'
ORDER BY log.id desc LIMIT 100 OFFSET 0;
Есть ли возможность оптимизировать этот запрос?
Вот вывод EXPLAIN (ANALYZE, BUFFERS):
"Limit (cost=30809.27..30820.93 rows=100 width=262) (actual time=11.793..11.803 rows=21 loops=1)"
" Buffers: shared hit=5 read=935"
" -> Gather Merge (cost=30809.27..31199.66 rows=3346 width=262) (actual time=11.791..11.799 rows=21 loops=1)"
" Workers Planned: 2"
" Workers Launched: 2"
" Buffers: shared hit=5 read=935"
" -> Sort (cost=29809.24..29813.43 rows=1673 width=262) (actual time=6.844..6.844 rows=7 loops=3)"
" Sort Key: log.id DESC"
" Sort Method: quicksort Memory: 27kB"
" Buffers: shared hit=1967 read=937"
" -> Hash Left Join (cost=3003.36..29719.67 rows=1673 width=262) (actual time=6.774..6.819 rows=7 loops=3)"
" Hash Cond: ((integration.account__c)::text = (acc.sfid)::text)"
" Buffers: shared hit=1953 read=937"
" -> Nested Loop Left Join (cost=2472.13..29167.33 rows=1673 width=254) (actual time=3.643..3.686 rows=7 loops=3)"
" Buffers: shared hit=969 read=468"
" -> Hash Left Join (cost=2471.71..17895.82 rows=1673 width=228) (actual time=3.635..3.673 rows=7 loops=3)"
" Hash Cond: (log.integration_id = integration.id)"
" Buffers: shared hit=969 read=468"
" -> Parallel Bitmap Heap Scan on integration_log log (cost=1936.93..17339.92 rows=1673 width=148) (actual time=0.097..0.132 rows=7 loops=3)"
" Recheck Cond: (((script_name)::text = 'ModifyTags'::text) AND ((script_type)::text = 'Pull'::text) AND (createddate >= '2018-11-01 00:00:00+05:30'::timestamp with time zone) AND (createddate <= '2018-12-07 23:59:59+05: (...)"
" Filter: (id IS NOT NULL)"
" Heap Blocks: exact=19"
" Buffers: shared read=26"
" -> Bitmap Index Scan on ah_idx_integeration_log_script_name (cost=0.00..1935.93 rows=4016 width=0) (actual time=0.201..0.201 rows=21 loops=1)"
" Index Cond: (((script_name)::text = 'ModifyTags'::text) AND ((script_type)::text = 'Pull'::text) AND (createddate >= '2018-11-01 00:00:00+05:30'::timestamp with time zone) AND (createddate <= '2018-12-07 23:59:59 (...)"
" Buffers: shared read=5"
" -> Hash (cost=483.79..483.79 rows=4079 width=80) (actual time=3.463..3.463 rows=4079 loops=3)"
" Buckets: 4096 Batches: 1 Memory Usage: 481kB"
" Buffers: shared hit=887 read=442"
" -> Seq Scan on integration__c integration (cost=0.00..483.79 rows=4079 width=80) (actual time=0.012..2.495 rows=4079 loops=3)"
" Buffers: shared hit=887 read=442"
" -> Index Scan using property__c_pkey on property__c prop (cost=0.42..6.74 rows=1 width=30) (actual time=0.001..0.001 rows=0 loops=21)"
" Index Cond: (log.property_id = id)"
" -> Hash (cost=498.88..498.88 rows=2588 width=42) (actual time=3.098..3.098 rows=2577 loops=3)"
" Buckets: 4096 Batches: 1 Memory Usage: 220kB"
" Buffers: shared hit=950 read=469"
" -> Seq Scan on account acc (cost=0.00..498.88 rows=2588 width=42) (actual time=0.011..2.531 rows=2577 loops=3)"
" Buffers: shared hit=950 read=469"
"Planning time: 2.513 ms"
"Execution time: 13.904 ms"
На самом делеУ меня есть решение по оптимизации, здесь запрос будет выглядеть следующим образом.
SELECT
log.id,
integration.id AS intid,
log.integration_id AS integration_id,
integration.name,
log.createddate
FROM integration log
LEFT JOIN integration__sf integration on ( integration.id = log.integration_id)
LEFT JOIN property prop on ( log.property_id = prop.id )
LEFT JOIN account acc on ( acc.sfid = integration.account AND prop.account = acc.sfid AND prop.group_membership = integration.grouping)
WHERE log.id IS NOT NULL
AND log.script_type = 'Pull'
AND log.script_name = 'ModifyTags'
AND log.createddate >= '2018-11-01 00:00:00'
AND log.createddate <= '2018-11-30 23:59:59'
ORDER BY log.id desc LIMIT 100 OFFSET 0
Если вы предложите больше, я буду благодарен.