From: Steinar H. Gunderson <sgunderson@bigfoot.com>
To: pgsql-performance@postgresql.org
Subject: Re: Hardware/OS recommendations for large databases (
Date: Sun, 20 Nov 2005 14:04:38 +0100
Message-ID: <20051120130438.GA31206@uio.no> (raw)
In-Reply-To: <BFA48F15.14182%llonergan@greenplum.com>
References: <437E2DF2.50906@rentec.com>
<BFA48F15.14182%llonergan@greenplum.com>
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/
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To: pgsql-performance@postgresql.org
Cc: sgunderson@bigfoot.com
Subject: Re: Hardware/OS recommendations for large databases (
In-Reply-To: <20051120130438.GA31206@uio.no>
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