What is the fastes batch_size for influxDBClient

Question

I want to write a list of 1,000,000 datapoints to my influxDB. I use this command:

client.write_points(listOfPoints[:1000000], batch_size=1000000)

This returns Entity Error: InfluxDBClientError: 413: {"error":"Request Entity Too Large"}

Alternatively:

client.write_points(listOfPoints[:1000000], batch_size=100000)

This works perfectly fine.

How do I find the fastes batch_size?