I have a store on magento 1.9.x
While entering values to a custom option on product edit page it gives "413 Request Entity Too Large" error.
I have to update 6000 values to a custom option but I am able to update only 1245 values..
After updating more than that it gives "413 Request Entity Too Large" error.
Please look on attached image for the error..
Please advice me to solve the issue..