What is the IIS7 default keepalive time?

Solution 1:

The default connection timeout in IIS7 is 2 minutes. Click on your web site in IIS Mgr, click Advanced Settings, and expand Connection Limits. The Connection Timeout (Seconds) setting is what governs this. If IIS doesn't receive activity on a connection for this duration then it will time the connection out. This is regardless of whether or not the connection was requested as a keep-alive. You will, of course, have to have keep-alives enabled for this to be a "keep-alive timeout". Keep-alive is enabled by default in IIS.

You can also set it for the site in the applicationHost.config file using the <limits> and the connectionTimeout attribute.

<limits connectionTimeout="00:02:00" />

This will set the timeout value to 2 minutes.

Solution 2:

HTTP KeepAlive is a true/false switch. If HTTP Keepalive is true, it will use the "Connection Timeout" setting (default 120 seconds)

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Solution 3:

Also you can use this option in your web.config

<system.web>
    <httpRuntime executionTimeout="180" />
</system.web>

https://msdn.microsoft.com/en-us/library/e1f13641%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396