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Process data in batches: https://docs.appian.com/suite/help/24.1/Records_Monitoring_Details.html
Enable 'Keep data available at high volumes' sync : https://docs.appian.com/suite/help/24.1/records-data-sync.html
Just out of curiosity, do you and NTRaman work in the same company or together?
I noticed that as soon as this user asks a question, you reply within 60 seconds, always! So I was curious.