How can I solve direct export error, in my store consisting 20k products, I know it's huge, how can I solve this export error.

> max_execution_time : 99999999; max_input_time : 16000; memory_limit 
> : 8048M

Output Screen Shot: 

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/lh6Ni.png