rmnet in combination with JSON GENERATE: Is there a limit to the length of the JSON string or the body in the HttpPost?

I have to post base data e.g. article data, customer data, prices to a website.

So I want to use rmnet in combination with JSON GENERATE.

Basic technic is allready working, e.g. connection to the website, getting a token, post one arcticle data.

Is there a limit to the length of the JSON string or the body in the HttpPost statement (REQUEST-PAYLOAD and REQUEST-LEN)?

If I post the basic data of about 10.000 articles, do I have to spilt the posts or is it better to generate all data into a separate file and post the whole file (if this is possible)?

Does anybody have any experiences about this questions? Unfornuately the sample programs (jgenerate.cbl or jsonPayload.cbl) are very simple.