This document discusses several new features in ASP.NET 4 for resource monitoring, request validation, session state, auto-starting web applications, output caching, URL limits, and object caching. It provides code examples for enabling application resource monitoring, writing custom request validators, using session state compression, and creating custom output cache providers. Contact information is also included at the end.

1. Sundararajan Subramanian
Associate Technical Architect | Aditi Technologies Ltd.,
http://tinyurl.com/codeshelve | sundararajans@hotmail.com

2. Asp.Net Resource Monitoring
Traditionally monitored at worker process
level
No insight into the individual applications
sharing the same worker process.
CLR 4 introduces ARM – Application
domain resource management
Enables monitoring resources at individual
appdomain level

3. Asp.Net Resource Monitoring
ASP.NET 4 exposes performance counters
built on ARM
Managed Memory Used
% Managed Processor Time

4. Asp.Net Resource Monitoring
• Enable ARM in aspnet.config file in the .Net
framework directory
<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
<runtime>
<appDomainResourceMonitoring enabled="true"/>
</runtime>
</configuration>

5. Resource Monitoring

6. Extensible Request Validation
Write your own custom Request Validators
Step1: Inherit from
System.Web.Util.RequestValidator
Step2: Override IsValidRequestString(….)
Step3: configure custom request validator in
web.config
<httpRuntime requestValidationType="Samples.MyValidator,
Samples" />

7. Request Validation

8. Session State
Out-Of-Proc Session State Compression
Compressed using GZIP -
System.IO.Compression.GZipStream
<sessionState mode="SqlServer"
sqlConnectionString="data source=dbserver;Initial
Catalog=aspnetstate"
allowCustomSqlDatabase="true"
compressionEnabled="true" />

9. Auto start Web applications
Intensive operations to be performed when
application starts?
First request takes time?
Asp.Net 4 + IIS 7.5 + Windows 2008 R2 –
Configure Autostart Web apps

10. <applicationpools>
<add name="defaultappPool" startMode="AlwaysRunning"
/>
</applicationpools>
<sites>
<site name="MySite" id="1">
<application path="/"
serviceAutoStartEnabled="true"
serviceAutoStartProvider="PrewarmMyCache" >
<!-- Additional content -->
</application>
</site>
</sites>
<!-- Additional content -->
<serviceautostartproviders>
<add name="PrewarmMyCache"
type="MyNamespace.CustomInitialization, MyLibrary"
/>
</serviceautostartproviders>

11. Output Caching
Cache the response (output) in memory
previously
High memory footprint in case of
applications with heavy traffic
Asp.Net 4.0 provides features to write
custom output cache providers
Can use any storage mechanism to store
HTML content

12. Output cache
Create Custom output cache provider by
inheriting from
System.Web.Caching.OutputCacheProvider
Configure the provider in the providers
section of the web.config

13. Output Caching

14. URL limit
Previously 260 character limit.
Extend this character limit in Asp.net 4.0 by
config
<httpRuntime maxRequestPathLength="260"
maxQueryStringLength="2048" />
requestPathInvalidChars - Configure the
set of valid characters in the url
<httpRuntime
requestPathInvalidChars="&lt;,&gt;,*,%,&amp;,:,,?
" />

15. Other features
Custom Encoders
encoderType in <httpruntime> element
Object caching
Features of Asp.Net cache brought to other
non web applications
RedirectPermanent(..) – HTTP 301

16. References
Asp.Net
http://www.asp.net/

17. Feedback / QnA
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Please take a few moments to fill out our online
feedback form
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to ask your questions now!

18. Contact (optional slide)
Code snippets blog
http://tinyurl.com/codeshelve
http://sundars.net
Email Address
sundararajans@hotmail.com
Twitter - @sundararajans