From: Qingqing Zhou <zhouqq@cs.toronto.edu>
To: pgsql-hackers@postgresql.org
Subject: Re: qsort again (was Re: [PERFORM] Strange Create Index behaviour)
Date: Thu, 16 Feb 2006 12:47:50 +0800
Message-ID: <dt10bq$1bp$1@news.hub.org> (raw)
References: <43F38867.6010701@gpdnet.co.uk>
<19510.1140036968@sss.pgh.pa.us>
<19779.1140038874@sss.pgh.pa.us>
<43F39E53.1020009@gpdnet.co.uk>
<20781.1140046109@sss.pgh.pa.us>
<dt0rn0$2km1$1@news.hub.org>
<23107.1140064820@sss.pgh.pa.us>
"Tom Lane" <tgl@sss.pgh.pa.us> wrote
> "Qingqing Zhou" <zhouqq@cs.toronto.edu> writes:
> > By "did this 100 times" do you mean generate a sequence of at most
> > 200000*100 numbers, and for every 200000 numbers, the first half are all
> > zeros and the other half are uniform random numbers?
>
> No, I mean I ran the bit of SQL script I gave 100 separate times.
>
I must misunderstand something here -- I can't figure out that why the cost
of the same procedure keep climbing?
Regards,
Qingqing
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: zhouqq@cs.toronto.edu, pgsql-hackers@postgresql.org
Subject: Re: qsort again (was Re: [PERFORM] Strange Create Index behaviour)
In-Reply-To: <dt10bq$1bp$1@news.hub.org>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox