# Elasticsearch 7.9 will spend long time to forcemerge
**URL:** https://discuss.elastic.co/t/elasticsearch-7-9-will-spend-long-time-to-forcemerge/257983
**Category:** Elasticsearch
**Created:** [December 8, 2020, 11:47am UTC](https://discuss.elastic.co/t/elasticsearch-7-9-will-spend-long-time-to-forcemerge/257983 "2020-12-08T11:47:04Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@gaocx2000cn](https://discuss.elastic.co/u/gaocx2000cn)
#### Post date: [December 8, 2020, 11:47am UTC](https://discuss.elastic.co/t/elasticsearch-7-9-will-spend-long-time-to-forcemerge/257983/1 "2020-12-08T11:47:05Z")
Elasticsearch 7.9 will spend long time to forcemerge.
curl -s -XPOST http://:9200/\_forcemerge?max\_num\_segments=1
Elasticsearch 6.2 will spend less time to forcemerge.
We have same data source on Elasticsearch 6.2 and Elasticsearch 7.9.
Forcemerging on Elasticsearch 6.2 will take 7 hours, while forcemerging on Elasticsearch 7.9 will take 16 hours.
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [December 8, 2020, 9:47pm UTC](https://discuss.elastic.co/t/elasticsearch-7-9-will-spend-long-time-to-forcemerge/257983/2 "2020-12-08T21:47:55Z")
Welcome to our community! 😃
Are these on the exact same sorts of hardware?
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### Author:  [@gaocx2000cn](https://discuss.elastic.co/u/gaocx2000cn)
#### Post date: [December 8, 2020, 11:43pm UTC](https://discuss.elastic.co/t/elasticsearch-7-9-will-spend-long-time-to-forcemerge/257983/3 "2020-12-08T23:43:26Z")
Yes, they are on same hardware cluster.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [January 5, 2021, 11:43pm UTC](https://discuss.elastic.co/t/elasticsearch-7-9-will-spend-long-time-to-forcemerge/257983/4 "2021-01-05T23:43:31Z")
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