Citrix: Some trouleshooting tips

1. Which action will enable an Administrator to configure the Citrix XenApp farm to check the Local Host Cache (LHC) automatically for corruptions and to send alerts when there is a corruption?
   
   Ans: Add the CheckLHC.exe to the Healthe Monitoring and Recovery section
    
2. ServerA is experiencing connectivity issues communicating with Zone Data Collector. Upon examination, an Administratro determines that server to server communication has failed on one of the servers in the environment. The Administrator would like to verify that appropriate ports are opened in the environment. He should use following two commands to determine if the correct port is listenning on the servers.
   
   NETSTAT -A
   TELNET ServerA 2512
    
3. The Administrator of a Citrix XenApp farm enabled ICA Keep-Alive, but notices that the ICA Keep-Alive settins are NOT being used. What could the Administrator have done to prevent the ICA Keep-Alive settings from being used?
   
   Ans: The Administrator have enabled Session Reliability
    
4. If the data store is experiencing high CPU usage when there should not be significant read or writes to the data store, it is possible that the data store is not powerful enough to manage a query interval of 30 minutes. To determine whether or not the data store query interval is causing the high CPU usage on the data store, you can set the query interval to a very large number and test CPU usage. If the CPU usage returns to normal after you set a large query interval, the data store query interval is probably the cause of the high CPU usage. You can adjust the query interval based on performance testing.
   
   

   To test the query interval, set the interval to 60 minutes and then restart all the servers in the farm. If the data store is still experiencing constant high CPU usage, increase the query interval further. If the CPU usage returns to normal, you can try a smaller value. Continue these adjustments until data store CPU usage is normal.
    
   

   Important: Do not set the data store query interval higher than necessary. This interval serves as an important safeguard against lost updates. Setting the interval higher than necessary can cause delays in updating the local host cache of the farm’s member servers.