Re: Hardware/OS recommendations for large databases (

From: "Steinar H(dot) Gunderson" <sgunderson(at)bigfoot(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Hardware/OS recommendations for large databases (
Date: 2005-11-20 13:04:38
Message-ID: 20051120130438.GA31206@uio.no
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-performance

On Sat, Nov 19, 2005 at 08:13:09AM -0800, Luke Lonergan wrote:
> Iowait is time spent waiting on blocking io calls.

To be picky, iowait is time spent in the idle task while the I/O queue is not
empty. It does not matter if the I/O is blocking or not (from userspace's
point of view), and if the I/O was blocking (say, PIO) from the kernel's
point of view, it would be counted in system.

/* Steinar */
--
Homepage: http://www.sesse.net/

In response to

Browse pgsql-performance by date

  From Date Subject
Next Message Alan Stange 2005-11-20 13:42:09 Re: Hardware/OS recommendations for large databases (
Previous Message William Yu 2005-11-20 12:55:14 Re: Hardware/OS recommendations for large databases (