I actually got pretty worried here, there is a config
partial_post_size = Integer
When a yaws file receives large POSTs, the amount of data
received in each chunk is determined by the this parameter. The
deafult value is 10240.
I found two errors in the yaws code,
The man page is wrong, there is an additional value, which erronously
was the default value - namely nolimit
So I've just changed the default value and corrected the man page. Your
remedy here is to explicitly set the partial_post_size to e.g 10240 in
your yaws.conf file and you'll be all set.
Thanks for reporting