In Splunk 6.3.3, I saw the Activity > System activity. Documents says in 6.4.1, 6.4.2, 6.4.3 also has Activity, but I didn't see this in Splunk.
I find the answer for above question
In splunk documentation they need to remove that topic for 6.4+, since that content has now been
entirely replaced by Distributed Management Console dashboards:
http://docs.splunk.com/Documentation/Splunk/6.4.3/DMC/DMCoverview
We can view DMC dashboards on an individual instance, just like the old
default dashboards. Here is a sample of information available in the DMC
dashboards:
http://docs.splunk.com/Documentation/Splunk/6.4.3/DMC/WhatcanDMCdo
If you go through the (nontrivial) setup steps for a deployment, you can
use one instance to view information for all instances in your deployment.
http://docs.splunk.com/Documentation/Splunk/6.4.3/DMC/Deploymentsetupsteps
I find the answer for above question
In splunk documentation they need to remove that topic for 6.4+, since that content has now been
entirely replaced by Distributed Management Console dashboards:
http://docs.splunk.com/Documentation/Splunk/6.4.3/DMC/DMCoverview
We can view DMC dashboards on an individual instance, just like the old
default dashboards. Here is a sample of information available in the DMC
dashboards:
http://docs.splunk.com/Documentation/Splunk/6.4.3/DMC/WhatcanDMCdo
If you go through the (nontrivial) setup steps for a deployment, you can
use one instance to view information for all instances in your deployment.
http://docs.splunk.com/Documentation/Splunk/6.4.3/DMC/Deploymentsetupsteps