Sitecore 8.1 - Sitecore publishing stucks and CD server contents not updated

• Sitecore 8.1 is not publishing and “initializing” is going forever
•  CD website contents are not updated after publish to CD while the database is up to date

 Solution:

•        Add the following handler server to CM environment at sitecore.config file to clear HTML cache in the remote server (CD environment)

• \App_Config\Sitecore.config file, set the Indexing.UpdateInterval setting to the 00:00:00 value  on both CM and CD servers

•  Comment the CleanupEventQueue agent is set to <IntervalToKeep>06:00:00</IntervalToKeep> on both CM and CD. The <DaysToKeep>1</DaysToKeep> 

•  \App_Config\Sitecore.config file, remove the __system index definition under the \configuration\sitecore\search\configuration element:

<search>

...

  <configuration type="Sitecore.Search.SearchConfiguration, Sitecore.Kernel" singleInstance="true">

    <indexes hint="list:AddIndex">

      <index id="system" type="Sitecore.Search.Index, Sitecore.Kernel">
      ...

      </index>

    </indexes>

  </configuration>

</search>

•        On both CM and CD servers, keep disabled Sitecore Performance Counters, Sitecore Memory Monitor and Sitecore Health Monitor: