# Segments Size in ES cluster

**URL:** <https://discuss.elastic.co/t/segments-size-in-es-cluster/121634>\
**Category:** Elasticsearch\
**Created:** [February 27, 2018, 10:58am UTC](https://discuss.elastic.co/t/segments-size-in-es-cluster/121634 "2018-02-27T10:58:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![moni15moni](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/moni15moni/32/42311_2.png) [@moni15moni](https://discuss.elastic.co/u/moni15moni)\
**Post date:** [February 27, 2018, 10:58am UTC](https://discuss.elastic.co/t/segments-size-in-es-cluster/121634/1 "2018-02-27T10:58:32Z")

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Hi

My cluster has a volume of 16 Billion data with 1300 Shards and 12 TB of data and Data Nodes of,Each (16 GB ,2 TB & 4 Cores).  
The no of segments are increased to ==\> 19734 . IS there lead to any I/O issues. Because now the indexing is in really trouble and indexing was slower than 20 x by normal.

Any suggestions /clarfications

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 27, 2018, 10:58am UTC](https://discuss.elastic.co/t/segments-size-in-es-cluster/121634/2 "2018-03-27T10:58:43Z")

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Closed on March 27, 2018, 10:58am UTC

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