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From David kerber <dcker...@verizon.net>
Subject Re: Tomcat 6 Memory Heap Limit
Date Tue, 15 Feb 2011 16:26:52 GMT
On 2/15/2011 11:15 AM, Johnson, Rob E wrote:
> Thanks,
>
> I have one instance of Tomcat running for a single app. Is is possible
> to create additional instances of tomcat, then cluster or load balance
> the instances, to help my user performance?

That's going to depend entirely on the app, and what your limiting 
factor is right now.  If you just want to support more simultaneous 
users, then probably yes.  If your app doesn't perform well for even a 
single user due to memory restrictions, then probably not.




>
>
> Rob Johnson MBA/IT
> IT Specialist
> ONRR
> 303-231-3963
> 303-589-9278 (Cell)
>
>
> -----Original Message-----
> From: David kerber [mailto:dckerber@verizon.net]
> Sent: Tuesday, February 15, 2011 9:11 AM
> To: Tomcat Users List
> Subject: Re: Tomcat 6 Memory Heap Limit
>
> On 2/15/2011 10:57 AM, Johnson, Rob E wrote:
>> It is a stand alone 32 bit server
>
> The most a 32-bit OS can give to any process is ~3GB, and anything over
> 2GB requires changing some boot settings.  But you'll be able to run a
> bunch of tomcat instances, all with 2 or 3GB, with that much physical
> RAM.
>
>
>
>>
>>
>> Rob Johnson MBA/IT
>> IT Specialist
>> ONRR
>> 303-231-3963
>> 303-589-9278 (Cell)
>>
>>
>> -----Original Message-----
>> From: Leon Rosenberg [mailto:rosenberg.leon@gmail.com]
>> Sent: Tuesday, February 15, 2011 8:55 AM
>> To: Tomcat Users List
>> Subject: Re: Tomcat 6 Memory Heap Limit
>>
>> Windows Server 2003<- is this a 32 bit OS?
>> And if not, are you using 64 bit java vm?
>>
>> regards
>> Leon
>>
>> On Tue, Feb 15, 2011 at 4:51 PM, Johnson, Rob E<Rob.Johnson@onrr.gov>
>> wrote:
>>>
>>> Hi,
>>> Apache Tomcat 6.0.20
>>> Windows Server 2003
>>> 50G RAM
>>> I'm running Apache Tomcat 6.0 as a service on a Windows 2003 Server
>>> with 50G of RAM. I want to fully utilize the 50G of RAM (40G) but I
>>> cannot get the Apache Service to start again if I go any higher than
>>> the setting listed below:
>>> -Xms1024m -Xmx1024m
>>> -XX:MaxPermSize=256M
>>> -XX:PermSize=512
>>> I initially used the Tomcat Configuration Manager to attempt to
>>> adjust
>>
>>> these setting. I also tried setting them in the registry,
>>> HKLM/software/ApacheSoftwareFoundation/Procrun2.0/Tomcat6/Parameters/
>>> J av e (jvms and jvmx). I also tried adding creating an Environmental
>
>>> Variable; JAVA_OPTS -Xms1024m -Xmx1024m.
>>> Thanks,
>>> Rob
>>>
>>> Rob Johnson MBA/IT
>>> IT Specialist
>>> ONRR
>>> 303-231-3963
>>> 303-589-9278 (Cell)


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