From: Artur Zając <azajac@ang.com.pl>
To: 'Tom Lane' <tgl@sss.pgh.pa.us>
Cc: 'Robert Haas' <robertmhaas@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Difference between explain analyze and real execution time
Date: Mon, 15 Nov 2010 22:30:32 +0100
Message-ID: <009f01cb850c$55f962e0$01ec28a0$@ang.com.pl> (raw)
In-Reply-To: <7142.1289855035@sss.pgh.pa.us>
References: <000001cb849e$1dce2720$596a7560$@ang.com.pl>
<AANLkTim=wpohtfWkNx-=22jcagXndrfTwjvogNt9=f0D@mail.gmail.com>
<009d01cb8505$ce738900$6b5a9b00$@ang.com.pl>
<7142.1289855035@sss.pgh.pa.us>
> I've changed default_statistics_target to 10000 and I think that is a
> reason.
> That's certainly going to cost you something, but this seems like a mighty
large slowdown, especially for a non-join query. What datatype is te.idtr,
anyway?
Integer not null and primary key of t_positions table.
Table t_positions has about 1500000 records, table t_st about 130000
records.
-------------------------------------------
Artur Zajac
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To: pgsql-performance@postgresql.org
Cc: azajac@ang.com.pl, tgl@sss.pgh.pa.us, robertmhaas@gmail.com
Subject: Re: Difference between explain analyze and real execution time
In-Reply-To: <009f01cb850c$55f962e0$01ec28a0$@ang.com.pl>
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