# Heavy bulk request on single index is slow

**URL:** <https://discuss.elastic.co/t/heavy-bulk-request-on-single-index-is-slow/137919>\
**Category:** Elasticsearch\
**Created:** [June 29, 2018, 8:43am UTC](https://discuss.elastic.co/t/heavy-bulk-request-on-single-index-is-slow/137919 "2018-06-29T08:43:24Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![ashishtiwari1993](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ashishtiwari1993/32/135241_2.png) [@ashishtiwari1993](https://discuss.elastic.co/u/ashishtiwari1993)\
**Post date:** [June 29, 2018, 8:43am UTC](https://discuss.elastic.co/t/heavy-bulk-request-on-single-index-is-slow/137919/1 "2018-06-29T08:43:24Z")

</div>

Hi guys,

I am experiencing some weird thing. I am having 20 indexes. So when i do bulk insert/update on all index, The thread pool shows me

```
curl -XGET http://localhost:9200/_cat/thread_pool
localhost bulk 24 7881 0

```

And whenever i am heaving bulk request on single index it showing me

```
curl -XGET http://localhost:9200/_cat/thread_pool
localhost bulk 24 350 0

```

Both queue size is different. Any idea how i can scale ?

version : 6.2  
jvm : 30g  
OS : centos7

thread\_pool.index.size : 24  
thread\_pool.index.queue\_size : 10000

Thanks

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<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [June 29, 2018, 9:07am UTC](https://discuss.elastic.co/t/heavy-bulk-request-on-single-index-is-slow/137919/2 "2018-06-29T09:07:24Z")

</div>

I would recommend you have a look at [this blog post](https://www.elastic.co/blog/why-am-i-seeing-bulk-rejections-in-my-elasticsearch-cluster) as I believe it describes how this works.

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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:** [July 27, 2018, 9:07am UTC](https://discuss.elastic.co/t/heavy-bulk-request-on-single-index-is-slow/137919/3 "2018-07-27T09:07:25Z")

</div>

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