Scroll vs "search_after"

[dvas0004]

Both used process searches with large number of results

• Scrolls require less code to use, but there is some small overhead to create a scroll context and the problem of "deep pagination" (if you use sorting)
• Search_after is much more lightweight, doesn't have the deep pagination problem but requires extra code and application logic

[dvas0004]

https://rimdev.io/elasticsearch-sinking-in-deep-paging-quicksand/