There is full detail in the TPAM Administration Guide:
NOTE: We do not recommend canceling a batch job unless the wrong file was selected for processing or if there is a degradation in the TPAM appliance performance as a result of the batch job.:
To cancel a batch import/update that is still running:
1.Select Batch Processing | Manage Batches from the main menu.
2.Enter your filter criteria on the Filter tab and click the Listing tab.
3. Select the batch job on the Listing tab.
4. Click the Details tab.
5. Click the Cancel Select Batch button.
6. Enter the text displayed to continue with the batch job cancellation and click the Continue button.
When running batch processing jobs, it is recommended to initially review with smaller batches to ensure the impact and time to run is understood. Running a batch processing job that impacts hundreds or thousands of accounts should be separated into smaller batches if possible.