Embodiments regard composite batching to manage throughput for online commerce applications. An embodiment of one or more storage mediums include instructions for processing online transaction requests for an order management service to generate transaction records, the online transaction requests including at least a first type of transaction and a second type of transaction; accumulating the transaction records in a storage; automatically determining a batch size for application program interface (API) requests for the transaction records and a frequency rate for the API requests based at least in part on a throughput rate for the processed transaction requests; and process the API requests to the order management service.