Hi Adrian, Thanks for your quick reply. It seems that this didn't resolve the problem. I also notice that once it gets overloaded the utilization drops from 80% to 60%. This is what puzzles me because I thought when it gets overloaded, the utilization should increase.
While I was testing an 8 core server, the overloaded behaviour happens when the utilization is only 40%, which is quite low. Best wishes, Weikun ________________________________________ From: Adrian Crum [[email protected]] Sent: 13 August 2014 14:04 To: [email protected] Subject: Re: Low utilization of OFBiz on multi core servers Your are running your tests on a development deployment. Try setting up your deployment for production: https://cwiki.apache.org/confluence/display/OFBTECH/Apache+OFBiz+Technical+Production+Setup+Guide Adrian Crum Sandglass Software www.sandglass-software.com On 8/13/2014 1:12 PM, Wang, Weikun wrote: > Hi all, > > I'm using OFBiz to study the performance of web service in the cloud. > I found a problem when I deploy OFBiz on a 2 core server, which has > 4G memory. The OFBiz I used is the 12.04.03 version. The OS is ubuntu > 12.04. > > I was using OFBench to send requests to OFBiz. The OFBench is able > to send different kinds of requests, like login, logout, visit main page. > I was testing how many users I set in OFBench will saturate the server. > At some point I found that the server was overloaded when I set 20 > users because the mean response time for the "main" request is over > 10 seconds. However, the CPU utilization is only 60%. I also did a test > for one core server. When it's overloaded, the utilization is almost 100%. > > I was using the default derby database. I monitor the memory of the > 2 core server, it was like 2GB used. So I guess memory is not a problem. > The other parameters are default. This is not the first time I notice this > problem. I also found this on other multi-core servers. > > Could anyone help me on this please? > > Thanks a lot in advance!!!! > > Best wishes, > Weikun >
