@ClarissaL16661030 In Pega Customer Decision Hub, the batch size in General Configuration controls how many customer records are processed at one time during outbound runs. If your system has enough memory and CPU, you can increase the batch size to process more records faster. But if the system slows down or uses too much memory, reduce the batch size to avoid performance issues. This setting mainly affects outbound campaigns, including segmentation and action selection. Always test changes in a lower environment before applying in production. Monitor system performance using tools like PDC or AES. Increase the batch size step by step and watch how the system behaves. The goal is to find a balance between speed and system stability.