surprising result:8CPU Sun 3500 VS 4CPU Dell 6650

From: chao_ping <chao_ping_at_vip.163.com>
Date: Fri, 15 Nov 2002 05:38:56 -0800
Message-ID: <F001.005041F4.20021115053856@fatcity.com>

Hi, dba friends:

	  The following is what i get this afternoon and want to share my test result with your friends, and hope to get your opinion about this result.
	  I am so surprised with my test result of Dell 6650 system vs Sun 3500.We are running RAC 9.2 on Dell 6650 dual node, and i want to apply patch to rac and converted application from rac to another database server(HA standby machine for another Sun 4500, idle in most time). The application is CPU intensive which capture snapshot from central database server and provide catalog service to web and middileware.
	The sun server is Sun 3500 with 8*400MCPU and 8G memory,and DELL RAC system with 4*1.4G Xeon MP 256K Cache and 4G memory.I wanted to move the application from RAC to sun(running oracle 8172),I stopped one rac node and converted the connection to sun 3500. Before i go to the next step of moving connection on the second node, i was suprised to find that the sun Server's load is 7(uptime result)!While the load on the remaining RAC node is 1! and finally i was unable to move the load on the other rac node to sun, for sun is already overloaded.

	I ran the application on 3500 for 4 hours. The average load on sun is 5-7, while on the Dell node, it is 1-1.5. Sar result shows that sun has average of 30% CPU idle,while Dell has 70% CPU idle.

	I should say that the pressure on the two db server is the same, the middleware and alton(hardware) ensure that the pressure on both server is the same.
	So, what is the advantage of Sun? Redhat Advanced server and 920 is also so much stable, and Sun T3 disk array is also of poor performance. CPU poor, disk array not that good, why sun?
	

Regards
zhu chao
Eachnet DBA
86-21-32174588-667
chao_ping_at_vip.163.com
www.happyit.net
www.cnoug.org(Chinese Oracle User Group)

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Author: chao_ping
  INET: chao_ping_at_vip.163.com

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