IIS 7 and Above
Maximum Concurrent Connections - What is the true value?
Re: Maximum Concurrent Connections - What is the true value?
Nov 08, 2018 09:30 PM|lextm|LINK
In IIS I select my website and click "Advanced Settings" and in the Limits section there is a value called "Maximum Concurrent Connections" and that value is 4,294,967,295.
https://docs.microsoft.com/en-us/iis/configuration/system.applicationhost/sites/site/limits It is a per site limit, which does not associate with "The
service is unavailable".
At application pool level, there is another queue length, https://docs.microsoft.com/en-us/iis/configuration/system.applicationhost/applicationpools/add/
which controls when the web browsers receive 503 (The service is unavailable). You can read HTTP error log https://docs.microsoft.com/en-us/windows/desktop/http/types-of-errors-logged-by-the-http-server-api to
confirm if your users saw 503 when IIS logged "ConnLimit".