Multiple Application Pools

[Guest]

Hello All,

IIS 6.0 - I have an application which resides in its own application pool.
Does anyone know if we can create multiple application pools for the same
application?

If we can create multiple application pools to serve a single application's
request will it improve the performance?

Thanks for your suggestions!!

 

[Juan T. Llibre]

re:

If we can create multiple application pools to serve a single application's
request will it improve the performance?

No. An application can only run under one process.

How did you think performance would be improved ?

 

[Chris Fulstow]

You can, but they need to be on different servers
Check out these articles about creating a load-balanced web farm for
your application:

http://support.microsoft.com/kb/815162/en-us
http://www.west-wind.com/presentations/loadbalancing/NetworkLoadBalancingWindows2003.asp

 

[Juan T. Llibre]

Thanks, Chris, for pointing out that very special circumstance.
I assumed, as I suspect the situation is, that he's got only one server.

 

[David R. Longnecker]

You can using Web gardens; however, inspite of the MSFT documentation, I've
tried it and never saw a performance gain (or perhaps never hit the required
load to experience the need).

--

From MSFT TechNet:

Configuring Web Gardens with IIS 6.0 (IIS 6.0)

Important

This feature of IIS 6.0 is available only when IIS is running in worker process
isolation mode.

In IIS 6.0 worker process isolation mode, application pools enhance Web site
or application reliability by isolating applications and the worker processes
that service those applications. For even greater reliability, you can configure
an application pool to be supported by multiple worker processes. An application
pool that uses more than one worker process is called a Web garden. The worker
processes in a Web garden share the requests that arrive for that particular
application pool. If a worker process fails, another worker process can continue
to process requests.

Note

Web gardens are different from Web farms. A Web garden is configured on a
single server by specifying multiple worker processes for an application
pool. Web farms use multiple servers for a Web site.

Source: http://www.microsoft.com/technet/pr...e2c-a58b-4770-833b-df96cabe569e.mspx?mfr=true
--

To configure:

Properties of the application pool >
Performance tab >
Web garden section, change the maximum number of worker processes from 1
to your desired #.

-dl