# Elasticsearch upgrade from 1.7 to 2.2 write speed is very slow

**URL:** <https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148>\
**Category:** Elasticsearch\
**Created:** [April 3, 2016, 3:00am UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148 "2016-04-03T03:00:58Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![maple](https://avatars.discourse-cdn.com/v4/letter/m/a5b964/32.png) [@maple](https://discuss.elastic.co/u/maple)\
**Post date:** [April 3, 2016, 3:00am UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148/1 "2016-04-03T03:00:58Z")

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Elasticsearch upgrade from 1.7 to 2.2 write speed is very slow？？？？

I found that after the upgrade data is written to the elasticseach speed is very slow, slow to bear, but I don't know how to analyze the cause of the slow, look forward to your help。

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [April 3, 2016, 6:12am UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148/2 "2016-04-03T06:12:18Z")

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If you use bulk, it should not be that slow.

But yes, in 2.x, we now:

- fsync every request
- write doc values

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**Author:** ![maple](https://avatars.discourse-cdn.com/v4/letter/m/a5b964/32.png) [@maple](https://discuss.elastic.co/u/maple)\
**Post date:** [April 3, 2016, 8:13am UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148/3 "2016-04-03T08:13:35Z")

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thanks  
I hava not use bulk.

- fsync every request ？？？

I hope you can speak more details. Thank you very much！！！

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [April 3, 2016, 12:01pm UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148/4 "2016-04-03T12:01:59Z")

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So. Use bulk.

And you could read this [https://www.elastic.co/guide/en/elasticsearch/reference/2.3/index-modules-translog.html#\_translog\_settings](https://www.elastic.co/guide/en/elasticsearch/reference/2.3/index-modules-translog.html#_translog_settings)

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [April 3, 2016, 3:00pm UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148/6 "2016-04-03T15:00:08Z")

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I don't understand the question

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**Author:** ![Stone](https://avatars.discourse-cdn.com/v4/letter/s/c89c15/32.png) [@Stone](https://discuss.elastic.co/u/Stone)\
**Post date:** [May 22, 2016, 2:45pm UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148/7 "2016-05-22T14:45:42Z")

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I had to go back to 1.7.3. I found 2.3 was just so slow, it was unusable. Creating shards and indices just took for ever. The write speed in bulk was also very slow. I could not use 2.2.3. 1,7,3 was the last best version.

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**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, 10:49pm UTC](https://discuss.elastic.co/t/elasticsearch-upgrade-from-1-7-to-2-2-write-speed-is-very-slow/46148/8 "2017-07-05T22:49:56Z")

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