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Message-ID: <44E58699.1070806@datatechlabs.com>
Date: Fri, 18 Aug 2006 09:21:29 +0000
From: alvis <alvis@datatechlabs.com>
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To: Bucky Jordan <bjordan@lumeta.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Dell PowerEdge 2950 performance
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Bucky Jordan wrote:
> Here's some simplistic performance numbers:
> time bash -c "(dd if=/dev/zero of=bigfile count=125000 bs=8k && sync)"
>
> Raid0 x 2 (2 spindles) ~138 MB/s on BSD
>   
PE2950 FreeBSD6.1 i386 raid0 (2spindles):

time csh -c "(dd if=/dev/zero of=/data/bigfile count=125000 bs=8k && sync)"
125000+0 records in
125000+0 records out
1024000000 bytes transferred in 7.070130 secs (144834680 bytes/sec)
0.070u 2.677s 0:07.11 38.5%    23+224k 31+7862io 0pf+0w

mfi0: <Dell PERC 5/i> .
I recompiled kernel to get latest mfi driver.
Also "bce" NIC driver is buggy for 6.1 kernel you got in CD distro. Make 
sure you have latest drivers for bsd 6.1.
bonnie++
Version 1.93c       ------Sequential Output------ --Sequential Input- 
--Random-
Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- 
--Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  
/sec %CP
raid0        16000M   262  99 116527  38 26451  12   495  99 135301  46 
323.5  15
Latency             32978us     323ms     242ms   23842us     171ms    
1370ms
Version 1.93c       ------Sequential Create------ --------Random 
Create--------
raid0               -Create-- --Read--- -Delete-- -Create-- --Read--- 
-Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  
/sec %CP
                 16  5837  19 +++++ +++ +++++ +++  3463  11 +++++ +++ 
+++++ +++
Latency               555ms     422us      43us    1023ms      52us      
60us
1.93c,1.93c,raid0,1,1155819725,16000M,,262,99,116527,38,26451,12,495,99,135301,46,323.5,15,16,,,,,5837,19,+++++,+++,+++++,+++,3463,11,+++++,+++,+++++,+++,32978us,323ms,242ms,23842us,171ms,1370ms,555ms,422us,43us,1023ms,52us,60us


-- 
Best Regards,
alvis