IIS 6.0/7.0 Application Pool, Recycling & Log Tracing

IIS Application Pool
http://technet.microsoft.com/en-us/library/cc735247(WS.10).aspx

IIS Application Pool Recycling
http://technet.microsoft.com/en-us/library/cc735206(WS.10).aspx

IIS Process Recycling

http://msdn.microsoft.com/en-us/library/ms525803.aspx

Configuring Recycling Settings for an Application Pool (IIS 7)
http://technet.microsoft.com/en-us/library/cc753179(WS.10).aspx

Common Administrative Tasks (IIS 7)
http://technet.microsoft.com/en-us/library/cc771979(WS.10).aspx

How to enable logging in Internet Information Services (IIS 6.0)

http://support.microsoft.com/kb/313437

Enable Trace Logging for Failed Requests (IIS 7)
http://technet.microsoft.com/en-us/library/cc771979(WS.10).aspx

How to modify Application Pool Recycling events in IIS 6.0

http://support.microsoft.com/kb/332088

IIS Worker Process
http://technet.microsoft.com/en-us/library/cc735084(WS.10).aspx
 
IIS 6.0 does not serve unknown MIME types
http://support.microsoft.com/kb/326965
 
The IIS 6.0 Resource Kit Tools
http://support.microsoft.com/kb/840671