public inbox for [email protected]
help / color / mirror / Atom feedFrom: Charles Nadeau <[email protected]>
To: Andreas Kretschmer <[email protected]>
Cc: [email protected]
Subject: Re: Very poor read performance, query independent
Date: Mon, 10 Jul 2017 17:48:25 +0200
Message-ID: <CADFyZw4UanW5TbFajWKWhN9XcW+8gtCXw+kssHo47Wpr1A=zJw@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CADFyZw7aGoD0AaStxdyHByR5Qta=M5wx0v=iptKLhPUp+EOKvA@mail.gmail.com>
<[email protected]>
List-Unsubscribe: <mailto:[email protected]?body=unsub%20pgsql-performance>
Andreas,
Because the ratio between the Sequential IOPS and Random IOPS is about 29.
Taking into account that part of the data is in RAM, I obtained an
"effective" ratio of about 22.
Thanks!
Charles
On Mon, Jul 10, 2017 at 5:35 PM, Andreas Kretschmer <[email protected]
> wrote:
>
>
> Am 10.07.2017 um 16:03 schrieb Charles Nadeau:
>
>> random_page_cost | 22
>>
>
>
> why such a high value for random_page_cost?
>
> Regards, Andreas
>
> --
> 2ndQuadrant - The PostgreSQL Support Company.
> www.2ndQuadrant.com
>
>
>
> --
> Sent via pgsql-performance mailing list ([email protected])
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-performance
>
--
Charles Nadeau Ph.D.
http://charlesnadeau.blogspot.com/
reply
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: [email protected]
Cc: [email protected], [email protected]
Subject: Re: Very poor read performance, query independent
In-Reply-To: <CADFyZw4UanW5TbFajWKWhN9XcW+8gtCXw+kssHo47Wpr1A=zJw@mail.gmail.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox