The title is self-explanatory, if you’re using a form field to post text of arbitrary size, what limits are considered relevant? Memory limits, browser limits, application server limits?
Update:
A form method=post is the case. The form field is being used to submit a file (its contents) to the server. The file is generated on the client using a Java Applet. An alternative would be to store the file on disk and upload it using a file input in the form. However this will leave files on disk. Database isn’t an issue here, the file will be stored as a blob.
When using
enctype="multipart/form-data", the size is not limited by the protocol but by what your server can handle (RAM, hard disk space, database) or, as symcbean has pointed out, what the server is configured to handle.