What causes IIS to stop responding?

What causes IIS to stop responding?

An IIS or ASP.NET hang can cause your website to have slow page loads, timeouts, or 503 Service Unavailable errors. Hangs can be caused by blocked ASP.NET threads, bad configuration, or request queueing.

How do I troubleshoot IIS performance issue?

Helpful Troubleshooting Tips: Verify whether IIS is the issue or not by checking the Http Service Request Queues\CurrentQueueSize counter in the Windows performance monitor. If it’s 0, then there is no request stuck in an IIS queue. If it’s not an IIS issue, it must be a code-level problem in ASP.NET controller/page.

How do I view IIS requests?

In the Web Server Home Features view, go to the IIS section and select and open the Worker Processes feature. Select the Desired worker process then, in the Actions pane, click View Current Requests (or right-click on the Worker Process and select View Current Requests .

Was W3wp a performance counter?

When multiple ASP.NET worker processes are running, Common Language Runtime (CLR) performance counters will have names that resemble “W3wp#1” or “W3sp#2″and so on. This was remedied in . NET Framework 2.0 to include a counter named Process ID in the . NET CLR Memory performance object.

How do I monitor IIS services?

How to Monitor IIS Performance

  1. Perform HTTP Testing. By setting up a simple HTTP check that runs every minute, you can get a threshold, which you can use to determine whether the site is up or down.
  2. Use Performance Monitor.
  3. Use Task Manager.
  4. Use Event Viewer.
  5. Use Recommended Counter Monitors.

How does ASP net handle multiple requests?

The answer is that when ASP.NET see two or more requests from the same user( by checking their SessionID) and session is marked with both Read and Write, then it will execute the first request and queue all other requests such that only one request will execute from the same user at the same time.

What should I monitor in IIS?

Key IIS metrics to monitor

  • The structure of an IIS server. HTTP.sys and worker processes. URIs and resources.
  • Key IIS metrics. HTTP request metrics. HTTP response metrics. Availability metrics. Resource metrics.
  • Next step: Collect IIS metrics.

What is the difference between maprequesthandler and postmaprequesthandler?

MapRequestHandler – The MapRequestHandler event is used by the ASP.NET infrastructure to determine the request handler for the current request based on the file-name extension of the requested resource. PostMapRequestHandler – Occurs when ASP.NET has mapped the current request to the appropriate HTTP handler

What is resolverequestcache event in ASP NET?

ResolveRequestCache – Occurs when ASP.NET finishes an authorization event to let the caching modules serve requests from the cache, bypassing execution of the event handler and calling any EndRequest handlers. PostResolveRequestCache – Reaching this event means the request can’t be served from the cache, and thus a HTTP handler is created here.

What is beginbeginrequest event in ASP NET?

BeginRequest – Occurs as the first event in the HTTP pipeline chain of execution when ASP.NET responds to a request. The BeginRequest event signals the creation of any given new request. This event is always raised and is always the first event to occur during the processing of a request.

What is postauthenticaterequest event in ASP NET?

PostAuthenticateRequest – The PostAuthenticateRequest event is raised after the AuthenticateRequest event has occurred. All the information available is accessible in the HttpContext’s User property. AuthorizeRequest – The AuthorizeRequest event signals that ASP.NET has authorized the current request.