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From David Kerber <dcker...@verizon.net>
Subject Re: Tomcat Configuration in Multi Core Systems
Date Sun, 24 Apr 2011 12:54:35 GMT
On 4/24/2011 3:07 AM, sujikin wrote:
> Hi,
>
> Thanks for your replies. I was sure Server B will never will be able to
> match Server A even if it had
> infinite processors in it ( provided everything remains the same). Just
> wanted to confirm.
>
> @David
> Server B has *116* processors only.
> Slow because of time taken to handle single request.
32Gb shared among 116 processors isn't very much RAM for each process 
(that's why I assumed it was 16, not 116).  You'll likely get a 
performance boost if you can give it more RAM.



> Regards,
> Sujeet
>
>
>
> David Kerber wrote:
>> On 4/23/2011 2:31 PM, Sujeet Singh wrote:
>>> Hi,
>>>
>>> I have two servers which has below configuration,
>>>
>>> Server A has 32 GB RAM, 4  processors each of 2.8 GHz
>>>
>>> Server B has 32 GB RAM, 116  processors each of 1.6 GHz.
>>>
>>> Both servers has tomcat installed having same configuration.
>>>
>>> Tomcat of server B is at least half as slow as Server A.
>>>
>>> My question is...just by increasing the worker thread count, the
>>> performance
>>> of
>>> Server B can be increased or we need to do something else also?
>>>
>>> Tomcat version is 5.5 and Java version is 5. OS used is Solaris 10 SPARC.
>>>
>>> Thanks&   Regards,
>>> Sujeet
>>>
>> First, I assume you mean "16" processors in server B, rather than 116.
>>
>> You need to define "slow":  time to process a single request, or # of
>> requests it can handle?
>>
>> Server B's clock speed is about half that of A, so I would expect
>> (everything else being equal) that it would run at ~ half the speed of A
>> for a single request.  However, given that it has 4x as many processors,
>> it should be able to handle ~ 4x as many simultaneous requests, but each
>> of them will still take about 2x as long as they would on A.
>>
>>
>>
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>>


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