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From Jacques Le Roux <jacques.le.r...@les7arts.com>
Subject Re: Low utilization of OFBiz on multi core servers
Date Tue, 09 Sep 2014 15:38:45 GMT
I believe it's only about the UI, so nothing really important, I did not check code though

I also noticed there is a small error in <<Back-End Database “Update”>> section
The modified ST_ID is 5 (from Yellow to Black Pants) not 6
The (stType = 2) is correct though



Le 04/09/2014 15:17, Nick Rosser a écrit :
> <<TECH NOTE: The EXP and SR misses do not currently work on OFBiz due to a bug
introduced a few years ago. All misses are logged as NF (Not Found).>>
> I have to think that this was direct feedback from David Jones. Perhaps it is resolved
now, not sure to be honest.
> On 9/4/2014 8:22 AM, Jacques Le Roux wrote:
>> Le 13/08/2014 20:22, Nick Rosser a écrit :
>>> FWIW -- we went through a lot of performance pains implementing some high-volume
eComm apps. Ended up consulting directly with David Jones for 
>>> pointers / advise / strategy etc.
>>> As a result we put together this doc, may be of some help / interest:
>>> http://bigfish.solveda.com/help/guideCachingAndMemory.htm
>>> First section is all about the caching aspects of OFBiz, all the good DB caching
stuff in the framework.
>>> Scroll down to the "memory" section of the doc ... for a discussion about JVM
settings etc.
>> Interesting, thanks Nick.
>> I noticed there is a known bug
>> <<TECH NOTE: The EXP and SR misses do not currently work on OFBiz due to a
bug introduced a few years ago. All misses are logged as NF (Not Found).>>
>> Do you have more information about that, is it only on the UI side? Is it only information
missing there, or? Is there a Jira issue open, etc?
>> Jacques
>>> Nick
>>> On 8/13/2014 12:53 PM, JFradkin@styleline.com wrote:
>>>> I agree that looking at just CPU is not a good guide.
>>>> IO is usually the issue before cpu. If it was bad code the cpu might go 100%
>>>> before the IO.
>>>> But bus, memory etc all play a part.
>>>> Did you switch to Postgres? Not sure if Derby is the best for load testing.
>>>> I know with postgres each time a request is used it will use a new thread
>>>> and can make use of multiple CPU.
>>>> I am not sure if the JVM uses multiple core, but I imagine it has some form
>>>> of using multiple threads.
>>>> Any how I appreciate your sharing you found 20 concurrent users seems to
>>>> a max.
>>>> Not 100% sure, but I know I had to support 250 at my last job, but I used
>>>> many techniques.
>>>> For one I had three web servers. My Database server was very high end with
>>>> fiber SAN. I used different app servers for different parts of my app. I
>>>> using liferay as my portal engine, and I even had a separate server or some
>>>> of our larger clients, while smaller clients used a shared instance.
>>>> I guess my point is there are many ways to get an application to handle the
>>>> load.
>>>> -----
>>>> Joel Fradkin
>>>> -- 
>>>> View this message in context: http://ofbiz.135035.n4.nabble.com/Low-utilization-of-OFBiz-on-multi-core-servers-tp4653440p4653445.html
>>>> Sent from the OFBiz - User mailing list archive at Nabble.com.

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