Citrix server load is showing 10000 ...and apps are not delivering?

Load 10000 mean server full load so please check load Evalutor policy 

Default Load Evaluator:

Advanced Load Evaluator:

rebuild the PerfMon counters and restart the IMA Service.

run lodctr.exe /r.

This means FULL LOAD.

There can be various reasons :-

1> Check if any load eveluator is applied on the servers/ workser groups ... check these evaluators.

2> Try restarting IMA Service

Please go over this article 

http://support.citrix.com/article/CTX131584 

The server load is affected if the farm is set up without creating any Worker Groups.

1- If no work group is created, you can create one and publish the applications on workgroup.

2- Restart the IMA Service "   net start imaservice "