ps aux|head -1;ps aux|grep -v PID|sort -rn -k +3|head

SELECT procpid, START, now() - START AS lap, current_query  FROM ( SELECT backendid, pg_stat_get_backend_pid (S.backendid) AS procpid,pg_stat_get_backend_activity_start (S.backendid) AS START,pg_stat_get_backend_activity (S.backendid) AS current_query
FROM (SELECT pg_stat_get_backend_idset () AS backendid) AS S) AS S WHERE current_query <> '<IDLE>' and procpid=15874
ORDER BY lap DESC;

SELECT "******_edoc_queue".id FROM "******_edoc_queue" WHERE (("*******_edoc_queue"."edoc_id" = '521300000004TCS60515001FV-960157.pdf')  AND  ("*****_edoc_queue"."active" = true)) ORDER BY "*****_edoc_queue"."id"

postgres=# \c ***你的实际模式schema
You are now connected to database "stbg" as user "postgres".
stbg=# explain analyze SELECT "cus_center_new_edoc_queue".id FROM "cus_center_new_edoc_queue" WHERE (("cus_center_new_edoc_queue"."edoc_id" = '521300000008TCS60417066FV-960101.pdf')  AND  ("cus_center_new_edoc_queue"."active" = true)) ORDER BY "cus_center_new_edoc_queue"."id";---得到如下执行计划：
stbg= BY "cus_center_new_edoc_queue"."id";ter_new_edoc_queue"."active" = true)) ORDER QUERY PLAN         -----------------------------------------------------------------------------
Sort  (cost=21044.85..21044.85 rows=1 width=4) (actual time=109.905..109.905 ro
ws=0 loops=1)Sort Key: idSort Method: quicksort  Memory: 25kB->  Seq Scan on cus_center_new_edoc_queue  (cost=0.00..21044.84 rows=1 width=4) (actual time=109.880..109.880 rows=0 loops=1)Filter: (active AND ((edoc_id)::text = '521300000008TCS60417066FV-960101.pdf'::text))Rows Removed by Filter: 583348Planning time: 0.468 msExecution time: 109.952 ms
(8 rows)----可以看出执行查询时间：109.952 ms