Let win2008+iis7+asp. NET supports 100,000 concurrent request _win server

Today, around 17 o'clock in the afternoon, blog blog site to appear this error message:

Error Summary:

HTTP Error 503.2-service Unavailable
The Serverruntime@appconcurrentrequestlimit setting is being exceeded.

Detailed Error Information:

Module IIS Web Core
Notification beginrequest
Handler Staticfile

Error Code 0x00000000

Due to the default configuration used previously, the server can handle up to 5,000 simultaneous requests, and this afternoon due to a situation caused by more than 5000 concurrent requests, resulting in the above error.

To avoid such errors, we adjusted the settings based on the relevant documentation to allow the server to support 100,000 concurrent requests from the setup.

The specific settings are as follows:

1. Adjust the IIS 7 application pool queue Length

Change from the original default of 1000 to 65535.

IIS Manager > ApplicationPools > Advanced Settings

Queue length:65535

2. Adjust the Appconcurrentrequestlimit settings for IIS 7

Change from the original default of 5000 to 100000.

C:\windows\system32\inetsrv\appcmd.exe Set config/section:serverruntime/appconcurrentrequestlimit:100000

You can view this setting in%systemroot%\system32\inetsrv\config\applicationhost.config:

 code as follows:

<serverruntime appconcurrentrequestlimit= "100000"/>

3. Adjust the setting of Processmodel>requestqueuelimit in Machine.config

Change from the original default of 5000 to 100000.

 code as follows:

<configuration>
<system.web>
<processmodel enable= "true" requestqueuelimit= "100000"/>

Reference article: http://technet.microsoft.com/en-us/library/dd425294 (office.13). aspx

4. Modify the registry and adjust the number of simultaneous TCPIP connections supported by IIS 7

Change from the original default of 5000 to 100000.

 code as follows:

REG ADD hklm\system\currentcontrolset\services\http\parameters/v maxconnections/t reg_dword/d 100000

By completing the 4 settings above, you can support 100,000 concurrent requests, and the blog blog server has enabled the above settings.

Reference articles:

IIS 7.0 503 errors with generic handler ashx (. Implementing) IHttpAsyncHandler

Tuning Windows Server 2008 for PHP