Performance

Performance

ASP.NET and IIS scale very well, but you'll need to change a few settings to set up your server for lots of concurrent connections, as opposed to lots of requests per second.

IIS Configuration

Max concurrent requests per application

Increase the number of concurrent requests IIS will server at once:

• Open %windir%\inetsrv\config\applicationHost.config
• Locate the serverRuntime element
• Add the appConcurrentRequestLimit attribute if not already there and set it to a suitable number (5000 is the default in IIS7+)

Example

<serverRuntime appConcurrentRequestLimit="250000" />

ASP.NET Configuration

Request Queue Limit

Increase the request queue limit that affects how many concurrent requests ASP.NET will process:

• Open %windir%\Microsoft.NET\Framework\v4.0.30319\Config\machine.config
• Locate the processModel element
• Set the autoConfig attribute to false and the requestQueueLimit attribute to a suitable number

Example

<processModel autoConfig="false" requestQueueLimit="250000"/>