In what version is CAPC/PM is limit global search (Global_Search_dropdown) implemented, we are on 20.2.1, and do not see this option.
Release : 20.2
Component : CA Performance Center
It was introduced in 20.2.5.
In releases r20.2.4 and earlier the default Scope for the Global Search in the Performance Center web UI was to use 'All'. This performs a search for ALL fields for ALL item types. It's a substring match that can be slow for larger result sets.
As part of a search for efficiency improvements a Scope choice was added for the Global Search in r20.2.5. It adds a new option to set the Scope of the Search. The options available to choose from are:
Searches all Device and Interface item Name values.
Current default Global Search option.
Search term must be part of Device and/or Interface Name values or they will not be returned in the Search Results.
Searches all fields for all item types using a substring match.
Previous default Global Search option when no choice was available
To use the Global Search in the scope that returns all items set it to 'Scope: All'.
Once logged in, the Global Search will retain the Scope option selected. Can also close and relaunch the UI in a browser and if not presented with log in the chosen Scope should remain.
Logging out of the UI and back in will reset the Global Search Scope back to the current default 'Scope: Name'.