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

help / color / mirror / Atom feed
From: Michael Stone <mstone+postgres@mathom.us>
To: pgsql-performance@postgresql.org
Subject: Re: Slow restoration question
Date: Wed, 03 May 2006 08:18:49 -0400
Message-ID: <20060503121847.GN31328@mathom.us> (raw)
In-Reply-To: <4A7F9950-65E0-4FA5-9FEC-BA1A93E615E5@clickspace.com>
References: <444F24E9.2010907@lisasoft.com>
	<20060502171617.GZ97354@pervasive.com>
	<622925BE-A31E-42FD-AF6A-68DDF3B4A1B7@clickspace.com>
	<1146595755.12053.111.camel@archimedes>
	<758B0591-3C9C-418B-9AF2-E962003C4904@rackspace.com>
	<20060502215329.GI97354@pervasive.com>
	<4A7F9950-65E0-4FA5-9FEC-BA1A93E615E5@clickspace.com>

On Tue, May 02, 2006 at 08:09:52PM -0600, Brendan Duddridge wrote:
>               -------Sequential Output-------- ---Sequential Input--  --Random--
>               -Per Char- --Block--- -Rewrite-- -Per Char- --Block---  --Seeks---
>Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec % CPU  /sec %CPU
>             0 40365 99.4 211625 61.4 212425 57.0 50740 99.9 730515  100.0 45897.9 190.1
[snip]
>Do these numbers seem decent enough for a Postgres database?

These numbers seem completely bogus, probably because bonnie is using a 
file size smaller than memory and is reporting caching effects. (730MB/s 
isn't possible for a single external RAID unit with a pair of 2Gb/s 
interfaces.) bonnie in general isn't particularly useful on modern 
large-ram systems, in my experience.

Mike Stone



view thread (23+ messages)  latest in thread

Message-ID: <20060503121847.GN31328@mathom.us>
Permalink:  ../20060503121847.GN31328@mathom.us/
Also on:    postgresql.org/message-id/20060503121847.GN31328@mathom.us

 · 

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: mstone+postgres@mathom.us
  Subject: Re: Slow restoration question
  In-Reply-To: <20060503121847.GN31328@mathom.us>

* 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