Setting Up IIS Application Pool (Windows)

IIS Application Pool contains all web applications installed on your
sites. If your service provider allocated a dedicated IIS application
pool for your sites, then you can have a level of isolation between web
applications used by your sites and web applications used by other
hosting users who host their websites on the same server. Because each
application pool runs independently, errors in one application pool will
not affect the applications running in other application pools.

Once you switch on the application pool, all web applications on your
websites will be using it.

To switch on dedicated IIS application pool for your websites:

1. Go to Websites & Domains > Dedicated IIS Application Pool for Website.
2. Click Switch On.
3. Specify the maximum number of worker processes permitted to service
   requests for the IIS application pool and the amount of time (in
   minutes) a worker process will remain idle before it shuts down.
4. To limit the amount of CPU resources that the IIS application pool
   can use, clear the Unlimited checkbox and provide a number (in
   percents) in the Maximum CPU use (%) field, select the action
   that IIS performs when a worker process exceeds the configured
   maximum CPU usage, and specify the reset period for monitoring of CPU
   usage on an application pool. When the specified number of minutes
   passes since the last reset, IIS resets CPU timers for the logging
   and for limit intervals.
5. Select the required recycling options depending on time or resources
   consumption to periodically recycle the IIS application pool and to
   avoid unstable states that can lead to application crashes, hangs, or
   memory leaks.
6. Click OK.

To stop all applications running in the application pool:

1. Go to Websites & Domains > Dedicated IIS Application Pool for Website.
2. Click Stop.

To start all applications in the application pool:

1. Go to Websites & Domains > Dedicated IIS Application Pool for Website.
2. Click Start.

By default, the IIS application pool is running
in the 64-bit mode. To run certain old versions of applications,
you may need to enable the 32-bit mode.

To enable IIS to run applications in the 32-bit mode:

1. Go to Websites & Domains > Dedicated IIS Application Pool for Website.
2. Select the “Enable 32-bit applications” checkbox and then click OK.

If you run applications that are known to have memory leaks or become
unstable after working for a long time, then you might need to restart
them from time to time.

To restart all applications running in the application pool:

1. Go to Websites & Domains > Dedicated IIS Application Pool for Website.
2. Click Recycle.

To switch off the dedicated IIS application pool for your websites:

1. Go to Websites & Domains > Dedicated IIS Application Pool for Website.
2. Click Switch Off.