From: Csaba Nagy <nagy@ecircle-ag.com>
To: mario.splivalo@mobart.hr
Cc: Pgsql performance <pgsql-performance@postgresql.org>
Subject: Re: Identical query on two machines, different plans....
Date: Thu, 20 Apr 2006 15:59:48 +0200
Message-ID: <1145541587.3553.30.camel@coppola.muc.ecircle.de> (raw)
In-Reply-To: <1145541113.9373.9.camel@localhost.localdomain>
References: <1145541113.9373.9.camel@localhost.localdomain>
You very likely forgot to run ANALYZE on your laptop after copying the
data. Observe the different row count estimates in the 2 plans...
HTH,
Csaba.
> QUERY PLAN
> ---------------------------------------------------------------------------------------------------------------------------------------------------
> Index Scan using ticketing_codes_uq_value_group_id on ticketing_codes
> (cost=0.00..6.02 rows=1 width=4) (actual time=0.104..0.107 rows=1
^^^^^^
> loops=1)
> Index Cond: (((code_value)::text = 'C7ZP2U'::text) AND (code_group_id
> = 1000))
> Total runtime: 0.148 ms
> (3 rows)
>
>
> PLAN
> ----------------------------------------------------------------------------------------------------------------------------------------------
> Bitmap Heap Scan on ticketing_codes (cost=2.01..1102.05 rows=288
^^^^^^^^
> width=4) (actual time=88.164..88.170 rows=1 loops=1)
> Recheck Cond: (((code_value)::text = 'C7ZP2U'::text) AND
> (code_group_id = 1000))
> -> Bitmap Index Scan on ticketing_codes_uq_value_group_id
> (cost=0.00..2.01 rows=288 width=0) (actual time=54.397..54.397 rows=1
> loops=1)
> Index Cond: (((code_value)::text = 'C7ZP2U'::text) AND
> (code_group_id = 1000))
> Total runtime: 88.256 ms
> (5 rows)
>
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To: pgsql-performance@postgresql.org
Cc: nagy@ecircle-ag.com, mario.splivalo@mobart.hr
Subject: Re: Identical query on two machines, different plans....
In-Reply-To: <1145541587.3553.30.camel@coppola.muc.ecircle.de>
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