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From "Huesgen, Chad" <chues...@litle.com>
Subject Question about Scalability of Jmeter-Server
Date Thu, 28 Aug 2008 15:35:45 GMT
Hello All,

I am designing some performance tests using jmeter-server and am getting
some inconsistent results.  My base assumption is that 2 jmeter servers
will get better performance numbers then 1 jmeter server or 1 jmeter
client by spreading the load across.  I am running a very simple ping
test here basically hitting a Tomcat server with a helloworld.jsp with a
500 milli sleep in it.  The setup is I have 2 servers acting as jmeter
servers and one server that is hosting Tomcat and the client.  The
servers only have one hop to each other and all tests run at night so no
network traffic should affect the ping.  My question is have people seen
numbers better and more consistent by spreading jmeter clients out
across 3 servers and not using jmeter-server?  If I saw a Std Dev all
under 100 and close to each other for each run than it would make me
feel much better with the results and confident that I can move onto
designing the real perf tests for the app.

Here are some numbers that I am seeing:

	
Test Case	Standard Dev	Avg	Median	Max	Min	90ile
95ile	99ile	
Jmeter Only 400 Threads	181.0445542	524.6929	503	9507
501	504	516	1223	
Jmeter Only 400 Threads	126.5504985	517.8482	503	3508
501	504	506	965	
Jmeter Only 400 Threads	213.6036281	534.2436	503	3517
501	504	516	1454	
									
One Server 400 Threads	203.1225482	537.1209	504	3577
501	558	582	1208	
One Server 400 Threads	211.2885383	545.0142	504	3582
501	569	617	1295	
One Server 400 Threads	238.3708453	539.7173	504	9504
501	559	582	1279	
									
Two Servers 400 Threads	167.2694959	521.1874	503	5060
501	504	505	1422	
Two Servers 400 Threads	175.2300215	523.661	503	3508	501
504	506	1310	
Two Servers 400 Threads	187.0677548	521.4626	503	4640
501	504	505	1142	
									
									
Jmeter Only 500 Threads	388.3772604	559.2594	503	9509
501	507	594	2402	
Jmeter Only 500 Threads	346.868954	549.8935	503	9509
501	507	672	1475	
Jmeter Only 500 Threads	340.8531506	554.2277	503	10191
501	506	633	1782	
									
One Server 500 Threads	499.4419659	545.5399	504	21513
501	560	576	1095	
One Server 500 Threads	230.4885537	546.537	504	3595	501
564	578	1752	
One Server 500 Threads	274.5812614	551.7715	505	5331
501	564	579	1442	
									
Two Servers 500 Threads	242.6634829	538.9398	503	9503
501	504	524	1775	
Two Servers 500 Threads	177.9699861	524.772	503	4398	501
504	514	1444	
Two Servers 500 Threads	365.8320039	540.0532	503	22621
501	505	525	1587	
				

Thanks,

Chad 
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