Event ID 26 — HTTP Service Response Cache Availability

Updated: April 17, 2008

Applies To: Windows Server 2008

Response Cache Availability relates to the ability of the HTTP Service to fulfill requests from its response cache.

Event Details

Product: Windows Operating System
ID: 26
Source: Microsoft-Windows-HttpEvent
Version: 6.0
Message: Failed to add an entry (URI %1) to the cache. Status: %2.


Stop unneeded processes

The server is running out of physical memory. You should stop unneeded process.

To stop unneeded processes:

  1. Press CTRL +ALT + DELETE simultaneously, and then click Start Task Manager.
  2. In Applications, press and hold CTRL while clicking the applications you want to close, and then click End Task.
  3. In Processes, press and hold CTRL while clicking the applications you want to close, and then click End Process.


Response cache entries should contain all URLs that have been successfully added to the cache.

To view the entries and their properties within the response cache:

  1. Click Start; click All Programs; click Accessories; right-click Command Prompt; click Run as administrator;** and then click **Continue.
  2. Type netsh http show cachestate to verify that the expected URL entries are in the cache.

show cachestate

Lists all resources and their associated properties that are cached in the HTTP response cache or displays a single resource and its associated properties.


show cachestate [[url=]string]




show cachestate [[url=]string]

Fully qualified URL. If unspecified, implies all URLs. The URL can also be a prefix to registered URLs.


show cachestate url=http://www.contoso.com:80/myresource

show cachestate

HTTP Service Response Cache Availability