...

Below is the definition for CPU Load TopN.   Note this is looking for a Statistic named cpuLoad and it looks for it in the derived_data section of the nodes node's MongoDB database entry.   This means to have this TopN work for your node there must be a PRINT line in Common-stats.nmis which returns "cpuLoad" calculated / normalised from that nodes CPU statistics.  See next section for more information on calculating.

The items y

// VERSION=2.46.0
{
  "name": "TopN CPU Load",
  "tags": [ "topn" ],
  "ep_template_file": "charts/topn/topn_table_component",
  "ep_configuration_file" : "charts/topn/topn_table_component_configuration",
  "options": {
    "titleText": "TopN CPU Load",
    "limit" : 10,
    "show_element": 0,
    "show_sparkline": 0,
    "show_value": 1
  },
  "order": 1,
  "parameters": {
    "topn_key": "cpuLoad",
    "data_section": "derived_data",
  },
  "type": "ep_template"
}

...

The new TopN table should now appear in opCharts TopN page and also as an option when adding a component to a dashboard under the opCharts data source.

Last Step

After the previous steps have been completed, make sure the nmis_topn_export.pl script has run, then check the TopN page for the new data.  If there is none, verify the data is being created by checking <omkd_topn> directory for the new json file.  Verify the file has contents, if it does not run the nmis_topn_export.pl in debug and search the output for the new entry field/data.