Azure design for large data volumn

Sonalk 

Hi 

Do you have detailled logs about that .I would suggest to have a look on the data flows performance and tuning guide 

Mapping data flow performance and tuning guide - Azure Data Factory | Microsoft Docs

You can also  consider performing  data orchestration using Azure Batch and Data factory for large volumes of data 

Process large-scale datasets by using Data Factory and Batch - Azure Data Factory | Microsoft Docs