# Search\_after How does it function internally? **URL:** \ **Category:** Elasticsearch\ **Created:** [August 21, 2017, 9:18am UTC](https://discuss.elastic.co/t/search-after-how-does-it-function-internally/97732 "2017-08-21T09:18:12Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![SKumarMN](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/skumarmn/32/27537_2.png) [@SKumarMN](https://discuss.elastic.co/u/SKumarMN)\ **Post date:** [August 21, 2017, 9:18am UTC](https://discuss.elastic.co/t/search-after-how-does-it-function-internally/97732/1 "2017-08-21T09:18:12Z")
As part of ES 5.x search after is introduced to assist in deep pagination. I would like to know some insights into the internal functional mechanism of search-after when compared to from-to . I am not looking for the usage rather I am interested in workings like what happens when search\_after is used i.e how coordinating node queries the documents which avoids problems that arises in deep navigation ---
**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\ **Post date:** [August 21, 2017, 11:00am UTC](https://discuss.elastic.co/t/search-after-how-does-it-function-internally/97732/2 "2017-08-21T11:00:54Z")
Hey, the PR might help [https://github.com/elastic/elasticsearch/pull/16125](https://github.com/elastic/elasticsearch/pull/16125) - especially the changes in the query phase class. --Alex ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [September 18, 2017, 11:00am UTC](https://discuss.elastic.co/t/search-after-how-does-it-function-internally/97732/3 "2017-09-18T11:00:58Z")
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