From: Andrzej Zawadzki <zawadaa@wp.pl>
To: Jeff Janes <jeff.janes@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Slow query after upgrade from 9.0 to 9.2
Date: Fri, 11 Jan 2013 09:13:37 +0100
Message-ID: <50EFC9B1.5060604@wp.pl> (raw)
In-Reply-To: <CAMkU=1wFT5q_XyQstPMA-nw5kiC4f_uwZg_YgLpLoN=LDrtT3g@mail.gmail.com>
References: <50EEC2D5.3050602@wp.pl>
<CAMkU=1wFT5q_XyQstPMA-nw5kiC4f_uwZg_YgLpLoN=LDrtT3g@mail.gmail.com>
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On 10.01.2013 19:17, Jeff Janes wrote:
> On Thu, Jan 10, 2013 at 5:32 AM, Andrzej Zawadzki <zawadaa@wp.pl> wrote:
>> Why that's happens? All configurations are identical. Only engine is
>> different.
> Could you post explain (analyze, buffers) instead of just explain?
Impossible, 1h of waiting and I've killed that.
> Also, if you temporarily set enable_seqscan=off on 9.2, what plan do
> you then get?
Plan is different.
"Index Scan using sygma_arrear_credit_id on sygma_arrear sar
(cost=11.07..390.66 rows=1 width=265)"
" Index Cond: (credit_id = 3102309)"
" Filter: ((arrear_import_id = $0) AND (arrear_flag_id = 2))"
" InitPlan 1 (returns $0)"
" -> Limit (cost=0.00..11.07 rows=1 width=8)"
" -> Nested Loop (cost=0.00..54961299.49 rows=4963314 width=8)"
" Join Filter: (sa.arrear_import_id = ai.id)"
" -> Index Scan Backward using report_date_bank_id_key
on arrear_import ai (cost=0.00..62.81 rows=469 width=8)"
" Filter: (import_type_id = 1)"
" -> Materialize (cost=0.00..574515.68 rows=6138000
width=4)"
" -> Index Scan using
sygma_arrear_arrear_import_id_idx on sygma_arrear sa
(cost=0.00..519848.68 rows=6138000 width=4)"
" Filter: (arrear_flag_id = 2)"
The real query is still slow.
--
Andrzej Zawadzki
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To: pgsql-performance@postgresql.org
Cc: zawadaa@wp.pl, jeff.janes@gmail.com
Subject: Re: Slow query after upgrade from 9.0 to 9.2
In-Reply-To: <50EFC9B1.5060604@wp.pl>
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