# Bulk import performance

**URL:** <https://discuss.elastic.co/t/bulk-import-performance/38285>\
**Category:** Elasticsearch\
**Created:** [January 4, 2016, 3:16am UTC](https://discuss.elastic.co/t/bulk-import-performance/38285 "2016-01-04T03:16:53Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![milodky](https://avatars.discourse-cdn.com/v4/letter/m/53a042/32.png) [@milodky](https://discuss.elastic.co/u/milodky)\
**Post date:** [January 4, 2016, 3:16am UTC](https://discuss.elastic.co/t/bulk-import-performance/38285/1 "2016-01-04T03:16:54Z")

</div>

Hi,

I'm importing massive documents into Elasticsearch 1.7.1.

At the beginning everything looked fine but after sometime(roughly 1b data have been imported). The bulk indexing performance get worse.

Then I changed the refresh interval to -1, set the indices throttle policy to none and increased the bulk queue size, but these do not help too much.

One thing I do notice is that compared with the disk IO write, the disk IO read is quite high:

> ID PRIO USER DISK READ DISK WRITE SWAPIN IO\> COMMAND  
> 5143 be/4 elastics 9.53 M/s 43.38 K/s 0.00 % 90.59 % java -Xms15g -Xmx15g -Djava.awt.headless=true -XX:+UseParN~etc/elasticsearch org.elasticsearch.bootstrap.Elasticsearch  
> 5145 be/4 elastics 12.39 M/s 39.43 K/s 0.00 % 90.35 % java -Xms15g -Xmx15g -Djava.awt.headless=true -XX:+UseParN~etc/elasticsearch org.elasticsearch.bootstrap.Elasticsearch  
> 5144 be/4 elastics 12.08 M/s 35.49 K/s 0.00 % 90.26 % java -Xms15g -Xmx15g -Djava.awt.headless=true -XX:+UseParN~etc/elasticsearch org.elasticsearch.bootstrap.Elasticsearch  
> 5146 be/4 elastics 14.60 M/s 55.21 K/s 0.00 % 90.04 % java -Xms15g -Xmx15g -Djava.awt.headless=true -XX:+UseParN~etc/elasticsearch org.elasticsearch.bootstrap.Elasticsearch

Is there anything else I can do to improve the situation?

Thanks,

Tim

---

<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 5, 2017, 11:27pm UTC](https://discuss.elastic.co/t/bulk-import-performance/38285/2 "2017-07-05T23:27:22Z")

</div>

Closed on July 5, 2017, 11:27pm UTC