I'm working on a screen where system logs are rendering and default threshold per page is 10 and a load more button to fetch more data [No pagination].There are filtering, searching and sorting options available to help user to customize logs as per his needs.

But the question are : 

1. Do I need to purpose threshold customize options [per page results : 10, 20, 30 ...]. Never saw this option with "load more type of pagination"
2. Should I filter(search, sort)upfront data (available on the screen) or complete data available on the server