The performance of my production servers is being degraded and a report by the name of pzGetRecentsToPurge is involved. This is an OOTB report and I would like to know how it is involved. My hunch is that one of my custom rules is invoking it, but the process of confirming that is unrealistic unless I have some clues which opening the rule would help me with. Unfortunately when I use the search feature (All Content, All Applications) no results are shown. If I knew what ruleset and version it was in I could open that and open the rule.

I've noticed this search problem before. This rule cannot be found using the search function either:

Apparently rules marked Internal are being hidden from the search feature.