The first step is to verify that the collector process is running.  To do this, access the Linux Command Line Interface (CLI) and type the following:

ps –eaf | grep cht.

You should see results as shown below.

ps -eaf | grep cht
cht_age+  3318     1  0 Jun28 ?        00:02:50 /opt/cht_perfmon/embedded/bin/ruby /opt/cht_perfmon/embedded/lib/ruby/gems/2.1.0/gems/cht_perfmon-0.0.70/lib/perfmon_loop.rb
cht_age+  3322     1  0 Jun28 ?        00:00:23 cht_perfmon_collector_monitor
root      3465     1  0 Jun28 ?        00:06:22 /opt/chtcollectd/sbin/collectd -C /etc/chtcollectd/collectd.conf

If the agent is not running you can attempt a restart of the job and note any errors.  This will also read in any changes to the collectd.conf file.  To do this, run the following:

sudo /etc/init.d/chtcollectd restart