Re: Erroneous cost estimation for nested loop join

From: "Shulgin, Oleksandr" <oleksandr(dot)shulgin(at)zalando(dot)de>
To: kawamichi(at)tkl(dot)iis(dot)u-tokyo(dot)ac(dot)jp
Cc: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Erroneous cost estimation for nested loop join
Date: 2015-11-09 10:26:54
Message-ID: CACACo5STPGs7kJ5QQqD0YBLDwRAn-U=aAdxY1FyNRV2=aWgMKw@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Mon, Nov 9, 2015 at 11:08 AM, <kawamichi(at)tkl(dot)iis(dot)u-tokyo(dot)ac(dot)jp> wrote:

>
> - cost parameter calibration: random_page_cost = 92.89
>

This demands some explanation and raises question of value of seq_page_cost
parameter -- I don't see anything about it your mail.

--
Alex

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Etsuro Fujita 2015-11-09 10:34:03 Minor comment improvement to create_foreignscan_plan
Previous Message kawamichi 2015-11-09 10:08:58 Erroneous cost estimation for nested loop join