# Effect of Lucene Segments on Elasticsearch

DevFeed: [Effect of Lucene Segments on Elasticsearch](<https://devfeed.tech/articles/effect-of-lucene-segments-on-elasticsearch-39643.md>)

Original publisher: [Read original article](<https://www.gauravsarma.com/posts/2026-01-09_how-lucene-segments-affect-elasticsearch>)

Published: 2026-01-09T00:00:00Z

Content type: tutorial

Language: en

Sources: [Gaurav Sarma's Blog](<https://devfeed.tech/sources/gaurav-sarma-s-blog.md>)

Topics: [elasticsearch](<https://devfeed.tech/topics/elasticsearch.md>), [data](<https://devfeed.tech/topics/data.md>), [Databases](<https://devfeed.tech/topics/databases.md>)

Tags: [data](<https://devfeed.tech/tags/data.md>), [elasticsearch](<https://devfeed.tech/tags/elasticsearch.md>), [performance](<https://devfeed.tech/tags/performance.md>), [search-engine](<https://devfeed.tech/tags/search-engine.md>)

## AI overview

This deep dive explains how Elasticsearch relates to Lucene and how Lucene segments organize and represent data. It covers shards, inverted indexes, doc values, BKD trees, immutable segments, document updates, deletions, background segment merging, and reference counters used to keep searches consistent.

## Source excerpt

. [How Lucene Segments Affect Elasticsearch](how-lucene-segments-affect-elasticsearch-cover...