pg.ddx.io  pgsql-performance@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Andres Freund <andres@anarazel.de>
To: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: Allow a per-tablespace effective_io_concurrency setting
Date: Wed, 2 Sep 2015 18:45:56 +0200
Message-ID: <20150902164556.GF5286@alap3.anarazel.de> (raw)
In-Reply-To: <55E71E9E.4090403@2ndquadrant.com>
References: <CAHyXU0yaUG9R_E5=1gdXhD-MpWR=Gr=4=EHFD_fRid2+SCQrqA@mail.gmail.com>
	<CAHyXU0yiVvfQAnR9cyH=HWh1WbLRsioe=mzRJTHwtr=2azsTdQ@mail.gmail.com>
	<20141206130828.GA1314@momjian.us>
	<CAHyXU0wgpE2E3B+rmZ959tJT_adPFfPvHNqeA9K9mkJRAT9HXw@mail.gmail.com>
	<20141209204337.GC24488@momjian.us>
	<CAMkU=1w0nXDcwhyQurh+XCdQ2AyeSLBcMGqrNAYsckLbTqq3mw@mail.gmail.com>
	<55AA2469.20306@dalibo.com>
	<55AA27C3.7060009@dalibo.com>
	<20150902135351.GA5286@alap3.anarazel.de>
	<55E71E9E.4090403@2ndquadrant.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-hackers>

On 2015-09-02 18:06:54 +0200, Tomas Vondra wrote:
> Maybe the best thing we can do is just completely abandon the "number of
> spindles" idea, and just say "number of I/O requests to prefetch". Possibly
> with an explanation of how to estimate it (devices * queue length).

I think that'd be a lot better.


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers



view thread (23+ messages)  latest in thread

Message-ID: <20150902164556.GF5286@alap3.anarazel.de>
Permalink:  ../20150902164556.GF5286@alap3.anarazel.de/
Also on:    postgresql.org/message-id/20150902164556.GF5286@alap3.anarazel.de

 · 

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: pgsql-performance@postgresql.org
  Cc: andres@anarazel.de, tomas.vondra@2ndquadrant.com, pgsql-hackers@postgresql.org
  Subject: Re: Allow a per-tablespace effective_io_concurrency setting
  In-Reply-To: <20150902164556.GF5286@alap3.anarazel.de>

* 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