Is there a way to remove invalid nodes from the Servicenow Performance Dashboard list?

[Andrew Costigan]

Hi all

I recently cloned our prod instance over our non-prod stack and I've found something pretty annoying has happened. 

On the Servicenow Performance dashboard that I use as a homepage, the Monitorable Items choice list has retained the names of all the prod nodes in each of the non-prod instances. To make matters worse, before cloning, our prod instance was expanded from 4 nodes to 8 and it has retained the old node names as well. Therefore there is a list on 12 nodes in each non-prod instance that are invalid, that have to be trolled through to find the the correct nodes and of course, display as default so my home page is full of boxes that say "ERROR: Invalid series data" instead of displaying clunky graphs.

Is there a way to remove the references to these nodes?   I've tried looking through the performance_dashboards_iframe ui page which calls performance_dashboards_main.do but I'm struggling to find where this is located.

[Andrew Costigan · Accepted solution]

I ended up raising a HI ticket to get an answer to this one but will share the answer since they answered my question.

The nodes are stored in the snc_monitorable_item table.  You will need to add the admin role to the read and delete ACLs before trying to remove any of the dead nodes, as only the maint role has access to the table out of box.

Happy hunting!