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Re: Upgraded from 7.4 to 8.1.4 QUERIES NOW SLOW!!!

From: smiley2211 <smiley2211(at)yahoo(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Upgraded from 7.4 to 8.1.4 QUERIES NOW SLOW!!!
Date: 2007-09-21 13:14:22
Message-ID: 12820410.post@talk.nabble.com (view raw or flat)
Thread:
Lists: pgsql-performance
Dennis,

Thanks for your reply.

No, the OLD server are no longer available (decommissioned) - the new
servers are definitely better h\w.

I do not have any queries to EXPLAIN ANALYZE as they are built by the
application and I am not allowed to enable logging on for that server - so
where do I go from here???

I am pretty much trying to make changes in the postgresql.conf file but
don't have a CLUE as to what starting numbers I should be looking at to
change(???)

Here is the EXPLAIN ANALYZE for the ONE (1) query I do have...it takes 4 - 5
hours to run a SELECT with the 'EXPLAIN ANALYZE':

                                                                                         
QUERY PLAN                                                                                                    
                   
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-------------------
 Limit  (cost=100013612.76..299939413.70 rows=1 width=8) (actual
time=10084289.859..10084289.861 rows=1 loops=1)
   ->  Subquery Scan people_consent  (cost=100013612.76..624068438343.99
rows=3121 width=8) (actual time=10084289.853..10084289.853 rows=1 loops=1)
         ->  Append  (cost=100013612.76..624068438312.78 rows=3121
width=815) (actual time=10084289.849..10084289.849 rows=1 loops=1)
               ->  Nested Loop  (cost=100013612.76..100013621.50 rows=2
width=815) (actual time=10084289.846..10084289.846 rows=1 loops=1)
                     ->  Unique  (cost=100013612.76..100013612.77 rows=2
width=8) (actual time=10084289.817..10084289.817 rows=1 loops=1)
                           ->  Sort  (cost=100013612.76..100013612.77 rows=2
width=8) (actual time=10084289.814..10084289.814 rows=1 loops=1)
                                 Sort Key: temp_consent.id
                                 ->  Unique 
(cost=100013612.71..100013612.73 rows=2 width=36) (actual
time=10084245.195..10084277.468 rows=7292 loops=1)
                                       ->  Sort 
(cost=100013612.71..100013612.72 rows=2 width=36) (actual
time=10084245.191..10084254.425 rows=7292 loops=1)
                                             Sort Key: id, daterecorded,
answer
                                             ->  Append 
(cost=100013515.80..100013612.70 rows=2 width=36) (actual
time=10083991.226..10084228.613 rows=7292 loops=1)
                                                   ->  HashAggregate 
(cost=100013515.80..100013515.82 rows=1 width=36) (actual
time=10083991.223..10083998.046 rows=3666 loops=1)
                                                         ->  Nested Loop 
(cost=100000060.61..100013515.80 rows=1 width=36) (actual
time=388.263..10083961.330 rows=3702 loops=1)
                                                               ->  Nested
Loop  (cost=100000060.61..100013511.43 rows=1 width=36) (actual
time=388.237..10083897.268 rows=3702 loops=1)
                                                                     -> 
Nested Loop  (cost=100000060.61..100013507.59 rows=1 width=24) (actual
time=388.209..10083833.870 rows=3702 loops=1)
                                                                          
->  Nested Loop  (cost=100000060.61..100013504.56 rows=1 width=24) (actual
time=388.173..10083731.122 rows=3702 loops=1)
                                                                                
Join Filter: ("inner".question_answer_id = "outer".id)
                                                                                
->  Nested Loop  (cost=60.61..86.33 rows=1 width=28) (actual
time=13.978..114.768 rows=7430 loops=1)
                                                                                      
->  Index Scan using answers_answer_un on answers a  (cost=0.00..5.01 rows=1
width=28) (actual time=0.084..0.088 rows=1 loops=1)
                                                                                            
Index Cond: ((answer)::text = 'Yes'::text)
                                                                                      
->  Bitmap Heap Scan on questions_answers qa  (cost=60.61..81.23 rows=7
width=16) (actual time=13.881..87.112 rows=7430 loops=1)
                                                                                            
Recheck Cond: ((qa.answer_id = "outer".id) AND (((qa.question_tag)::text =
'consentTransfer'::text) OR ((qa.question_tag)::text = 'share
WithEval'::text)))
                                                                                            
->  BitmapAnd  (cost=60.61..60.61 rows=7 width=0) (actual
time=13.198..13.198 rows=0 loops=1)
                                                                                                  
->  Bitmap Index Scan on qs_as_answer_id  (cost=0.00..5.27 rows=649 width=0)
(actual time=9.689..9.689 rows=57804 loops=1)
                                                                                                        
Index Cond: (qa.answer_id = "outer".id)
                                                                                                  
->  BitmapOr  (cost=55.08..55.08 rows=6596 width=0) (actual
time=2.563..2.563 rows=0 loops=1)
                                                                                                        
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(actual time=1.923..1.923 rows=6237 loops=1)
                                                                                                              
Index Cond: ((question_tag)::text = 'consentTransfer'::text)
                                                                                                        
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(actual time=0.634..0.634 rows=2047 loops=1)
                                                                                                              
Index Cond: ((question_tag)::text = 'shareWithEval'::text)
                                                                                
->  Seq Scan on encounters_questions_answers eqa 
(cost=100000000.00..100007608.66 rows=464766 width=8) (actual
time=0.003..735.934 rows=464766 loop
s=7430)
                                                                          
->  Index Scan using encounters_id on encounters ec  (cost=0.00..3.02 rows=1
width=8) (actual time=0.016..0.018 rows=1 loops=3702)
                                                                                
Index Cond: (ec.id = "outer".encounter_id)
                                                                     -> 
Index Scan using enrollements_pk on enrollments en  (cost=0.00..3.82 rows=1
width=20) (actual time=0.008..0.010 rows=1 loops=3702)
                                                                          
Index Cond: ("outer".enrollment_id = en.id)
                                                               ->  Index
Scan using people_pk on people p  (cost=0.00..4.35 rows=1 width=8) (actual
time=0.008..0.010 rows=1 loops=3702)
                                                                     Index
Cond: (p.id = "outer".person_id)
                                                   ->  HashAggregate 
(cost=96.86..96.87 rows=1 width=36) (actual time=205.471..212.207 rows=3626
loops=1)
                                                         ->  Nested Loop 
(cost=60.61..96.85 rows=1 width=36) (actual time=13.163..196.421 rows=3722
loops=1)
                                                               ->  Nested
Loop  (cost=60.61..92.48 rows=1 width=36) (actual time=13.149..158.112
rows=3722 loops=1)
                                                                     -> 
Nested Loop  (cost=60.61..89.36 rows=1 width=24) (actual
time=13.125..120.021 rows=3722 loops=1)
                                                                          
->  Nested Loop  (cost=60.61..86.33 rows=1 width=28) (actual
time=13.013..48.460 rows=7430 loops=1)
                                                                                
->  Index Scan using answers_answer_un on answers a  (cost=0.00..5.01 rows=1
width=28) (actual time=0.030..0.032 rows=1 loops=1)
                                                                                      
Index Cond: ((answer)::text = 'Yes'::text)
                                                                                
->  Bitmap Heap Scan on questions_answers qa  (cost=60.61..81.23 rows=7
width=16) (actual time=12.965..28.902 rows=7430 loops=1)
                                                                                      
Recheck Cond: ((qa.answer_id = "outer".id) AND (((qa.question_tag)::text =
'consentTransfer'::text) OR ((qa.question_tag)::text = 'shareWithEv
al'::text)))
                                                                                      
->  BitmapAnd  (cost=60.61..60.61 rows=7 width=0) (actual
time=12.288..12.288 rows=0 loops=1)
                                                                                            
->  Bitmap Index Scan on qs_as_answer_id  (cost=0.00..5.27 rows=649 width=0)
(actual time=8.985..8.985 rows=57804 loops=1)
                                                                                                  
Index Cond: (qa.answer_id = "outer".id)
                                                                                            
->  BitmapOr  (cost=55.08..55.08 rows=6596 width=0) (actual
time=2.344..2.344 rows=0 loops=1)
                                                                                                  
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(actual time=1.762..1.762 rows=6237 loops=1)
                                                                                                        
Index Cond: ((question_tag)::text = 'consentTransfer'::text)
                                                                                                  
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(actual time=0.578..0.578 rows=2047 loops=1)
                                                                                                        
Index Cond: ((question_tag)::text = 'shareWithEval'::text)
                                                                          
->  Index Scan using ctccalls_qs_as_qaid on ctccalls_questions_answers cqa 
(cost=0.00..3.02 rows=1 width=8) (actual time=0.005..0.006 rows=1
loops=7430)
                                                                                
Index Cond: (cqa.question_answer_id = "outer".id)
                                                                     -> 
Index Scan using ctccalls_pk on ctccalls c  (cost=0.00..3.11 rows=1
width=20) (actual time=0.003..0.005 rows=1 loops=3722)
                                                                          
Index Cond: (c.id = "outer".call_id)
                                                               ->  Index
Scan using people_pk on people p  (cost=0.00..4.35 rows=1 width=8) (actual
time=0.004..0.005 rows=1 loops=3722)
                                                                     Index
Cond: (p.id = "outer".person_id)
                     ->  Index Scan using people_pk on people 
(cost=0.00..4.35 rows=1 width=815) (actual time=0.018..0.018 rows=1 loops=1)
                           Index Cond: (people.id = "outer".id)
               ->  Subquery Scan "*SELECT* 2" 
(cost=100000000.00..623968424691.25 rows=3119 width=676) (never executed)
                     ->  Seq Scan on people 
(cost=100000000.00..623968424660.06 rows=3119 width=676) (never executed)
                           Filter: (NOT (subplan))
                           SubPlan
                             ->  Subquery Scan temp_consent 
(cost=100010968.94..100010968.98 rows=2 width=8) (never executed)
lines 1-69/129 56%
                                                                              
Index Cond: (cqa.question_answer_id = "outer".id)
                                                                     -> 
Index Scan using ctccalls_pk on ctccalls c  (cost=0.00..3.11 rows=1
width=20) (actual time=0.003..0.005 rows=1 loops=3722)
                                                                          
Index Cond: (c.id = "outer".call_id)
                                                               ->  Index
Scan using people_pk on people p  (cost=0.00..4.35 rows=1 width=8) (actual
time=0.004..0.005 rows=1 loops=3722)
                                                                     Index
Cond: (p.id = "outer".person_id)
                     ->  Index Scan using people_pk on people 
(cost=0.00..4.35 rows=1 width=815) (actual time=0.018..0.018 rows=1 loops=1)
                           Index Cond: (people.id = "outer".id)
               ->  Subquery Scan "*SELECT* 2" 
(cost=100000000.00..623968424691.25 rows=3119 width=676) (never executed)
                     ->  Seq Scan on people 
(cost=100000000.00..623968424660.06 rows=3119 width=676) (never executed)
                           Filter: (NOT (subplan))
                           SubPlan
                             ->  Subquery Scan temp_consent 
(cost=100010968.94..100010968.98 rows=2 width=8) (never executed)
                                   ->  Unique 
(cost=100010968.94..100010968.96 rows=2 width=36) (never executed)
                                         ->  Sort 
(cost=100010968.94..100010968.95 rows=2 width=36) (never executed)
                                               Sort Key: id, daterecorded,
answer
                                               ->  Append 
(cost=100010872.03..100010968.93 rows=2 width=36) (never executed)
                                                     ->  HashAggregate 
(cost=100010872.03..100010872.04 rows=1 width=36) (never executed)
                                                           ->  Nested Loop 
(cost=100000907.99..100010872.02 rows=1 width=36) (never executed)
                                                                 Join
Filter: ("inner".question_answer_id = "outer".id)
                                                                 ->  Nested
Loop  (cost=60.61..90.69 rows=1 width=36) (never executed)
                                                                       -> 
Nested Loop  (cost=0.00..9.37 rows=1 width=36) (never executed)
                                                                            
->  Index Scan using people_pk on people p  (cost=0.00..4.35 rows=1 width=8)
(never executed)
                                                                                  
Index Cond: (id = $0)
                                                                            
->  Index Scan using answers_answer_un on answers a  (cost=0.00..5.01 rows=1
width=28) (never executed)
                                                                                  
Index Cond: ((answer)::text = 'Yes'::text)
                                                                       -> 
Bitmap Heap Scan on questions_answers qa  (cost=60.61..81.23 rows=7
width=16) (never executed)
                                                                            
Recheck Cond: ((qa.answer_id = "outer".id) AND (((qa.question_tag)::text =
'consentTransfer'::text) OR ((qa.question_tag)::text =
'shareWithEval'::text)
))
                                                                            
->  BitmapAnd  (cost=60.61..60.61 rows=7 width=0) (never executed)
                                                                                  
->  Bitmap Index Scan on qs_as_answer_id  (cost=0.00..5.27 rows=649 width=0)
(never executed)
                                                                                        
Index Cond: (qa.answer_id = "outer".id)
                                                                                  
->  BitmapOr  (cost=55.08..55.08 rows=6596 width=0) (never executed)
                                                                                        
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(never executed)
                                                                                              
Index Cond: ((question_tag)::text = 'consentTransfer'::text)
                                                                                        
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(never executed)
                                                                                              
Index Cond: ((question_tag)::text = 'shareWithEval'::text)
                                                                 ->  Hash
Join  (cost=100000847.38..100010780.52 rows=65 width=20) (never executed)
                                                                       Hash
Cond: ("outer".encounter_id = "inner".id)
                                                                       -> 
Seq Scan on encounters_questions_answers eqa 
(cost=100000000.00..100007608.66 rows=464766 width=8) (never executed)
                                                                       -> 
Hash  (cost=847.37..847.37 rows=3 width=20) (never executed)
                                                                            
->  Hash Join  (cost=214.73..847.37 rows=3 width=20) (never executed)
                                                                                  
Hash Cond: ("outer".enrollment_id = "inner".id)
                                                                                  
->  Index Scan using encounters_id on encounters ec  (cost=0.00..524.72
rows=21578 width=8) (never executed)
                                                                                  
->  Hash  (cost=214.73..214.73 rows=1 width=20) (never executed)
                                                                                        
->  Index Scan using enrollements_pk on enrollments en  (cost=0.00..214.73
rows=1 width=20) (never executed)
                                                                                              
Filter: ($0 = person_id)
                                                     ->  HashAggregate 
(cost=96.86..96.87 rows=1 width=36) (never executed)
                                                           ->  Nested Loop 
(cost=60.61..96.85 rows=1 width=36) (never executed)
                                                                 ->  Nested
Loop  (cost=60.61..93.72 rows=1 width=32) (never executed)
                                                                       -> 
Nested Loop  (cost=60.61..90.69 rows=1 width=36) (never executed)
                                                                            
->  Nested Loop  (cost=0.00..9.37 rows=1 width=36) (never executed)
                                                                                  
->  Index Scan using people_pk on people p  (cost=0.00..4.35 rows=1 width=8)
(never executed)
                                                                                        
Index Cond: (id = $0)
                                                                                  
->  Index Scan using answers_answer_un on answers a  (cost=0.00..5.01 rows=1
width=28) (never executed)
                                                                                        
Index Cond: ((answer)::text = 'Yes'::text)
                                                                            
->  Bitmap Heap Scan on questions_answers qa  (cost=60.61..81.23 rows=7
width=16) (never executed)
                                                                                  
Recheck Cond: ((qa.answer_id = "outer".id) AND (((qa.question_tag)::text =
'consentTransfer'::text) OR ((qa.question_tag)::text = 'shareWithEval':
:text)))
                                                                                  
->  BitmapAnd  (cost=60.61..60.61 rows=7 width=0) (never executed)
                                                                                        
->  Bitmap Index Scan on qs_as_answer_id  (cost=0.00..5.27 rows=649 width=0)
(never executed)
                                                                                              
Index Cond: (qa.answer_id = "outer".id)
                                                                                        
->  BitmapOr  (cost=55.08..55.08 rows=6596 width=0) (never executed)
                                                                                              
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(never executed)
                                                                                                    
Index Cond: ((question_tag)::text = 'consentTransfer'::text)
                                                                                              
->  Bitmap Index Scan on qs_as_qtag  (cost=0.00..27.54 rows=3298 width=0)
(never executed)
                                                                                                    
Index Cond: ((question_tag)::text = 'shareWithEval'::text)
                                                                       -> 
Index Scan using ctccalls_qs_as_qaid on ctccalls_questions_answers cqa 
(cost=0.00..3.02 rows=1 width=8) (never executed)
                                                                            
Index Cond: (cqa.question_answer_id = "outer".id)
                                                                 ->  Index
Scan using ctccalls_pk on ctccalls c  (cost=0.00..3.11 rows=1 width=20)
(never executed)
                                                                       Index
Cond: (c.id = "outer".call_id)
                                                                      
Filter: ($0 = person_id)
 Total runtime: 10084292.497 ms
(125 rows)


Thanks...Marsha

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Subject: Re: Upgraded from 7.4 to 8.1.4 QUERIES NOW SLOW!!!
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Subject: Re: Searching for the cause of a bad plan

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