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https://issues.apache.org/jira/browse/CONNECTORS-678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13641764#comment-13641764
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Karl Wright commented on CONNECTORS-678:
----------------------------------------
Erlend reports in actual use we're still getting lousy times. The new code
prints EXPLAIN ANALYZE so here's the output:
{code}
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Found a long-running query
(62339 ms): [SELECT
t0.id,t0.jobid,t0.dochash,t0.docid,t0.status,t0.failtime,t0.failcount,t0.priorityset
FROM jobqueue t0 WHERE t0.status IN (?,?) AND t0.checkaction=? AND
t0.checktime<=? AND EXISTS(SELECT 'x' FROM jobs t1 WHERE t1.status IN (?,?) AND
t1.id=t0.jobid AND t1.priority=?) AND NOT EXISTS(SELECT 'x' FROM jobqueue t2
WHERE t2.dochash=t0.dochash AND t2.status IN (?,?,?,?,?,?) AND
t2.jobid!=t0.jobid) AND NOT EXISTS(SELECT 'x' FROM prereqevents t3,events t4
WHERE t0.id=t3.owner AND t3.eventname=t4.name) ORDER BY t0.docpriority ASC
LIMIT 100]
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 0: 'P'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 1: 'G'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 2: 'R'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 3: '1366892554745'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 4: 'A'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 5: 'a'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 6: '5'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 7: 'A'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 8: 'F'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 9: 'a'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 10: 'f'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 11: 'D'
WARN 2013-04-25 14:23:37,175 (Stuffer thread) - Parameter 12: 'd'
WARN 2013-04-25 14:32:33,766 (Stuffer thread) - Plan: Limit
(cost=9603.72..9603.72 rows=1 width=155) (actual time=536587.381..536587.586
rows=100 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Sort
(cost=9603.72..9603.72 rows=1 width=155) (actual time=536587.379..536587.449
rows=100 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Sort Key:
t0.docpriority
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Sort Method:
top-N heapsort Memory: 51kB
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Nested Loop
Anti Join (cost=17.68..9603.71 rows=1 width=155) (actual
time=1.565..536578.061 rows=1592 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Join Filter: (t2.jobid
<> t0.jobid)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Nested Loop Semi
Join (cost=17.68..9595.09 rows=1 width=155) (actual time=1.551..536533.696
rows=1592 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Join Filter:
(t0.jobid = t1.id)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Nested Loop
Anti Join (cost=17.68..9593.04 rows=1 width=155) (actual
time=1.541..536504.762 rows=1592 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Join Filter:
(t0.id = t3.owner)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Bitmap
Heap Scan on jobqueue t0 (cost=4.53..6.54 rows=1 width=155) (actual
time=1.516..8.783 rows=1592 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan:
Recheck Cond: (status = ANY ('{P,G}'::bpchar[]))
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan:
Filter: ((checktime <= 1366892554745::bigint) AND (checkaction = 'R'::bpchar))
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: ->
Bitmap Index Scan on i1362584563122 (cost=0.00..4.53 rows=1 width=0) (actual
time=1.375..1.375 rows=8931 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan:
Index Cond: (status = ANY ('{P,G}'::bpchar[]))
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Hash
Join (cost=13.15..7637.41 rows=231632 width=8) (actual time=336.989..336.989
rows=0 loops=1592)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Hash
Cond: ((t3.eventname)::text = (t4.name)::text)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: ->
Seq Scan on prereqevents t3 (cost=0.00..4439.32 rows=231632 width=37) (actual
time=0.006..160.286 rows=231491 loops=1592)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: ->
Hash (cost=11.40..11.40 rows=140 width=516) (actual time=0.005..0.005 rows=0
loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan:
Buckets: 1024 Batches: 1 Memory Usage: 0kB
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan:
-> Seq Scan on events t4 (cost=0.00..11.40 rows=140 width=516) (actual
time=0.003..0.003 rows=0 loops=1)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Seq Scan on
jobs t1 (cost=0.00..2.03 rows=2 width=8) (actual time=0.008..0.008 rows=1
loops=1592)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Filter:
((status = ANY ('{A,a}'::bpchar[])) AND (priority = 5::bigint))
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: -> Index Scan using
i1362584563120 on jobqueue t2 (cost=0.00..4.30 rows=1 width=49) (actual
time=0.020..0.020 rows=0 loops=1592)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Index Cond:
((dochash)::text = (t0.dochash)::text)
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Filter: (status =
ANY ('{A,F,a,f,D,d}'::bpchar[]))
WARN 2013-04-25 14:32:33,767 (Stuffer thread) - Plan: Total runtime:
536587.771 ms
WARN 2013-04-25 14:32:33,767 (Stuffer thread) -
{code}
I'm reopening the ticket.
> Postgresql generating unusual and slow (76 second) plans for stuffer queries
> ----------------------------------------------------------------------------
>
> Key: CONNECTORS-678
> URL: https://issues.apache.org/jira/browse/CONNECTORS-678
> Project: ManifoldCF
> Issue Type: Bug
> Components: Framework core
> Affects Versions: ManifoldCF 1.1.1
> Reporter: Karl Wright
> Assignee: Karl Wright
> Priority: Critical
> Fix For: ManifoldCF 1.2
>
>
> Query plans like this seem to be taking place:
> {code}
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan: Limit
> (cost=9597.49..9597.49 rows=1 width=155)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan: -> Sort
> (cost=9597.49..9597.49 rows=1 width=155)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan: Sort Key:
> t0.docpriority
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan: -> Nested
> Loop Anti Join (cost=17.68..9597.48 rows=1 width=155)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan: Join
> Filter: (t2.jobid <> t0.jobid)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan: ->
> Nested Loop Semi Join (cost=17.68..9588.87 rows=1 width=155)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Join Filter: (t0.jobid = t1.id)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Nested Loop Anti Join (cost=17.68..9586.81 rows=1 width=155)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Join Filter: (t0.id = t3.owner)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Bitmap Heap Scan on jobqueue t0 (cost=4.53..6.54 rows=1 width=155)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Recheck Cond: (status = ANY ('{P,G}'::bpchar[]))
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Filter: ((checktime <= 1366628406182::bigint) AND (checkaction =
> 'R'::bpchar))
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Bitmap Index Scan on i1362584563122 (cost=0.00..4.53 rows=1
> width=0)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Index Cond: (status = ANY ('{P,G}'::bpchar[]))
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Hash Join (cost=13.15..7635.56 rows=231554 width=8)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Hash Cond: ((t3.eventname)::text = (t4.name)::text)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Seq Scan on prereqevents t3 (cost=0.00..4438.54 rows=231554
> width=37)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Hash (cost=11.40..11.40 rows=140 width=516)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Seq Scan on events t4 (cost=0.00..11.40 rows=140
> width=516)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> -> Seq Scan on jobs t1 (cost=0.00..2.03 rows=2 width=8)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Filter: ((status = ANY ('{A,a}'::bpchar[])) AND (priority = 5::bigint))
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan: ->
> Index Scan using i1362584563120 on jobqueue t2 (cost=0.00..4.30 rows=1
> width=49)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Index Cond: ((dochash)::text = (t0.dochash)::text)
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) - Plan:
> Filter: (status = ANY ('{A,F,a,f,D,d}'::bpchar[]))
> WARN 2013-04-22 13:01:20,414 (Stuffer thread) -
> {code}
> Here's the query:
> {code}
> EXPLAIN SELECT
> t0.id,t0.jobid,t0.dochash,t0.docid,t0.status,t0.failtime,t0.failcount,t0.priorityset
> FROM jobqueue t0 WHERE t0.status IN ('P','G') AND t0.checkaction='R' AND
> t0.checktime<=1366628406182 AND
> EXISTS(SELECT 'x' FROM jobs t1 WHERE t1.status IN ('A','a') AND
> t1.id=t0.jobid AND t1.priority=5) AND
> NOT EXISTS(SELECT 'x' FROM jobqueue t2 WHERE t2.dochash=t0.dochash AND
> t2.status IN ('A','F','a','f','D','d') AND t2.jobid!=t0.jobid) AND
> NOT EXISTS(SELECT 'x' FROM prereqevents t3,events t4 WHERE t0.id=t3.owner
> AND t3.eventname=t4.name) ORDER BY t0.docpriority ASC LIMIT 100;
> {code}
> This query was noted in the log as taking 76 seconds to execute.
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