Final answer:
There is no specific limit per shard in Kinesis Producer as it depends on the rate of data input and output.
Step-by-step explanation:
The supported rate of data input to an Amazon Kinesis Data Streams shard is 1000 records per second for writes, and the maximum size of each record is 1 MiB. The allowed data output is 2 MB per second for reads. So, there is no specific limit per shard, as it depends on the rate of data input and output.