Hi Sree,
please provide some version information about IS, SAP Adapter and JCo Libraries.
Please check your IS configuration for proper java memory settings (you might need to increase these values to avoid swapping or OutOfMemory exceptions).
You might want to rethink your implementation approach.
Instead of directly processing the large volume just publish the splitted data to a Messaging provider, i.e. UM or Broker, and then listen to this messaging queue and process the data in smaller chunks.
Regards,
Holger
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