@GayathriP6842

Can you tell us if there have been any recent changes on the system (update etc)?  Which classes and class instances were indexed?  (Enabling classes for search indexing)

Are any results being returned - is this a performance issue based on this specific search?

Did you go through some of the suggestions in the Troubleshooting Search indexing failures  and Troubleshooting Pega Platform Search  Guides?

Could you show us the status of the search jobs running?  Can you clarify what you see on the Search Landing Page today?

 Can you verify that your stream node is showing NORMAL status (Decisioning Services Infrastructure)

Is this only for the work objects which has the missing index?

Can you show a screenshot of the Param.pySearchMethod?  Does it use "CONTAINS" or "EXACT" in KMSearchParams data transform?

please enable the following loggers:

• PegaSearchExecutor 
• ESSearcher loggers 

This will help check how much time it takes to process query and execute it in Elasticsearch, and possibly rule out issues at the engine level. 

For example, if we see that there are large time delays in ESSearcher, it could mean that Elasticsearch itself needs a lot of time to process a query. But if we see that the time delays in both PEgaSearchExecutor and ESSearcher are short, it can indicate that for example rule execution engine needs a lot of time to process the activity.

Please enable these loggers, perform some searches and upload the logs for our analysis.