Re: Using pgiosim realistically

From: John Rouillard <rouilj(at)renesys(dot)com>
To: Jeff <threshar(at)torgo(dot)dyndns-server(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Using pgiosim realistically
Date: 2011-05-17 17:35:19
Message-ID: 20110517173519.GH27218@renesys.com
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On Mon, May 16, 2011 at 01:54:06PM -0400, Jeff wrote:
> Yep - you need multiple threads to get max throughput of your io.

I am running:

~/pgiosim -c -b 100G -v -t4 file[0-9]*

Will each thread move 100GB of data? I am seeing:

158.69%, 4260 read, 0 written, 3407.64kB/sec 425.95 iops

Maybe the completion target percentage is off because of the threads?

--
-- rouilj

John Rouillard System Administrator
Renesys Corporation 603-244-9084 (cell) 603-643-9300 x 111

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