Re: Please help with this explain analyse...

I restored my db but haven't run the analyse... That was the problem.

Thanks
/David

"Merge Left Join  (cost=2273.54..2290.19 rows=228 width=816) (actual
time=2098.257..2444.472 rows=8335 loops=1)"
"  Merge Cond: (("outer".rrnum)::text = "inner"."?column8?")"
"  ->  Merge Join  (cost=2131.25..2141.31 rows=228 width=744) (actual
time=2037.953..2251.289 rows=8335 loops=1)"
"        Merge Cond: ("outer"."?column31?" = "inner"."?column77?")"
"        ->  Sort  (cost=1975.03..1975.60 rows=228 width=235) (actual
time=1798.556..1811.828 rows=8335 loops=1)"
"              Sort Key: (cr.crrrnum)::text"
"              ->  Hash Join  (cost=1451.41..1966.10 rows=228 width=235)
(actual time=267.751..515.396 rows=8335 loops=1)"
"                    Hash Cond: ("outer".crnum = "inner".cscrnum)"
"                    ->  Seq Scan on cr  (cost=0.00..489.77 rows=4529
width=101) (actual time=0.077..97.615 rows=8335 loops=1)"
"                          Filter: (((crypnum)::text = 'M'::text) AND
((crdate + '00:00:00'::interval) <= '2005-01-28 00:00:00'::timestamp
without time zone))"
"                    ->  Hash  (cost=1449.70..1449.70 rows=684
width=134) (actual time=267.568..267.568 rows=13587 loops=1)"
"                          ->  Nested Loop  (cost=20.59..1449.70
rows=684 width=134) (actual time=33.099..178.524 rows=13587 loops=1)"
"                                ->  Seq Scan on gl  (cost=0.00..5.21
rows=2 width=91) (actual time=0.021..0.357 rows=1 loops=1)"
"                                      Filter: (glsoctrl = 1)"
"                                ->  Bitmap Heap Scan on cs
(cost=20.59..684.42 rows=3026 width=43) (actual time=33.047..115.151
rows=13587 loops=1)"
"                                      Recheck Cond: ((cs.csglnum)::text
= ("outer".glnum)::text)"
"                                      Filter: ('M'::text =
(csypnum)::text)"
"                                      ->  Bitmap Index Scan on
cs_gl_fk  (cost=0.00..20.59 rows=3026 width=0) (actual
time=32.475..32.475 rows=13587 loops=1)"
"                                            Index Cond:
((cs.csglnum)::text = ("outer".glnum)::text)"
"        ->  Sort  (cost=156.22..159.65 rows=1372 width=509) (actual
time=239.315..254.024 rows=8974 loops=1)"
"              Sort Key: (rr.rrnum)::text"
"              ->  Seq Scan on rr  (cost=0.00..84.72 rows=1372
width=509) (actual time=0.055..33.564 rows=1372 loops=1)"
"  ->  Sort  (cost=142.29..144.55 rows=903 width=72) (actual
time=60.246..74.813 rows=8932 loops=1)"
"        Sort Key: (yr.yrref)::text"
"        ->  Bitmap Heap Scan on yr  (cost=16.42..97.96 rows=903
width=72) (actual time=8.513..13.587 rows=1154 loops=1)"
"              Recheck Cond: (((yryotype)::text = 'Client'::text) AND
((yryonum)::text = 'Comptabilite.Recevable.Regroupement'::text))"
"              ->  Bitmap Index Scan on yr_idx1  (cost=0.00..16.42
rows=903 width=0) (actual time=8.471..8.471 rows=1154 loops=1)"
"                    Index Cond: (((yryotype)::text = 'Client'::text)
AND ((yryonum)::text = 'Comptabilite.Recevable.Regroupement'::text))"
"Total runtime: 2466.197 ms"

>Bricklen Anderson <BAnderson@PresiNET.com> writes:
>
>
>>Your loops are what is causing the time spent.
>>eg. "actual time=0.127..17.379 rows=1154 loops=8335)" ==
>>8335*(17.379-0.127)/1000=>143 secs (if my math is correct).
>>
>>
>
>As for where the problem is, I think it's the horrid misestimate of the
>number of matching rows in cs_pk:
>
>
>
>>>"                    ->  Index Scan using cs_pk on cs  (cost=0.00..12.83
>>>rows=2 width=144) (actual time=0.087..444.999 rows=13587 loops=1)"
>>>"                          Index Cond: (('M'::text = (cs.csypnum)::text)
>>>AND ((cs.csglnum)::text = ("outer".glnum)::text))"
>>>
>>>
>
>Has that table been ANALYZEd recently?  How about the gl table?
>
>            regards, tom lane
>
>
>