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Posted to users@tomcat.apache.org by Arun M <ma...@gmail.com> on 2008/10/12 06:35:17 UTC
Hardware requirements for Tomcat
Hi All,
I need to know the hardware requirements in CentOS for hosting a website
which have 1000 concurrent users.
I am using Tomcat 5.5, Mysql 5.1 and Java1.5.
We are planning to host two servers one for application server and other for
database server.
What should be hardware requirements for Both Servers like RAM, Harddisk,
Max Processors etc.,
Thanks in Advance
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Re: Hardware requirements for Tomcat
Posted by ib solution <ib...@gmail.com>.
hai,
> "Model it and measure". Though, be critical of your measurements, too.
> I've been involved in a case where the developers were claiming that an
> application running on a two-machine cluster with 2GB JVM heaps on each
> machine did require at least 4GB heap/machine. After proper
> investigation, a memory leak in the application server (not Tomcat) was
> found, and eventually corrected by the server vendor. After the
> correction, the JVM heaps were lowered to 1GB/machine, and most possibly
> could be lowered even further.
what software that can test memory leak ?
--
TIA,
Andy Susanto,S.Kom
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On Sun, Oct 12, 2008 at 3:09 PM, Juha Laiho <Ju...@iki.fi> wrote:
> Arun M wrote:
>>
>> I need to know the hardware requirements in CentOS for hosting a website
>> which have 1000 concurrent users. I am using Tomcat 5.5, Mysql 5.1 and
>> Java1.5.
>
> That depends a lot more on your application and usage patterns than on
> the OS/application server/database server.
>
>> We are planning to host two servers one for application server and other
>> for
>> database server.
>
> That's a good basic division.
>
>> What should be hardware requirements for Both Servers like RAM, Harddisk,
>> Max Processors etc.,
>
> "Model it and measure". Though, be critical of your measurements, too.
> I've been involved in a case where the developers were claiming that an
> application running on a two-machine cluster with 2GB JVM heaps on each
> machine did require at least 4GB heap/machine. After proper
> investigation, a memory leak in the application server (not Tomcat) was
> found, and eventually corrected by the server vendor. After the
> correction, the JVM heaps were lowered to 1GB/machine, and most possibly
> could be lowered even further.
>
> So, in as early stage as possible, create some kind of test setup where
> you can see effects of different work loads on your servers. Extrapolate
> from results, and as you gain knowledge of the application and workload,
> rerun your tests to get better estimates.
> --
> ..Juha
>
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> To start a new topic, e-mail: users@tomcat.apache.org
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>
>
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Re: Hardware requirements for Tomcat
Posted by Juha Laiho <Ju...@iki.fi>.
Arun M wrote:
> I need to know the hardware requirements in CentOS for hosting a website
> which have 1000 concurrent users.
> I am using Tomcat 5.5, Mysql 5.1 and Java1.5.
That depends a lot more on your application and usage patterns than on
the OS/application server/database server.
> We are planning to host two servers one for application server and other for
> database server.
That's a good basic division.
> What should be hardware requirements for Both Servers like RAM, Harddisk,
> Max Processors etc.,
"Model it and measure". Though, be critical of your measurements, too.
I've been involved in a case where the developers were claiming that an
application running on a two-machine cluster with 2GB JVM heaps on each
machine did require at least 4GB heap/machine. After proper
investigation, a memory leak in the application server (not Tomcat) was
found, and eventually corrected by the server vendor. After the
correction, the JVM heaps were lowered to 1GB/machine, and most possibly
could be lowered even further.
So, in as early stage as possible, create some kind of test setup where
you can see effects of different work loads on your servers. Extrapolate
from results, and as you gain knowledge of the application and workload,
rerun your tests to get better estimates.
--
..Juha
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