# How to make the ES merge to use my new setting
**URL:** https://discuss.elastic.co/t/how-to-make-the-es-merge-to-use-my-new-setting/105996
**Category:** Elasticsearch
**Created:** [November 1, 2017, 7:56am UTC](https://discuss.elastic.co/t/how-to-make-the-es-merge-to-use-my-new-setting/105996 "2017-11-01T07:56:43Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Eli\_Revach](https://discuss.elastic.co/u/Eli_Revach)
#### Post date: [November 1, 2017, 7:56am UTC](https://discuss.elastic.co/t/how-to-make-the-es-merge-to-use-my-new-setting/105996/1 "2017-11-01T07:56:43Z")
Hello,
ES 1.7 ,very large cluster arount 200 Nodes ( 100B events per month) .
I am struggling to keep my number of segments per shard low without having
to perform some forced \_optimize (we like to do that in order to optimize ES memory and to avoid GC's when searching for data). I thought setting "segments\_per\_tier" and
"max\_merge\_at\_once" with a low value would limit the number of segments,
but no matter what I set my shards always end up with about very high
Our system store time base data , so we have one index per month , running the hot\_threads API i see that the merge tasks are running only on the last index ( the one that we load data to it now )
We use the defult index.merge.\* parameters , but by try to overwrite it for old index still don't do any effect :
curl -XPUT 'localhost:9200/index\_name\_of\_past\_month/\_settings' -d
'{
"settings": {
"index.merge.policy.max\_merge\_at\_once": 10,
"index.merge.scheduler.max\_thread\_count": 10,
"index.merge.scheduler.max\_merge\_count": 10,
"index.merge.policy.segments\_per\_tier": 5,
"index.merge.policy.max\_merged\_segment": "10gb"
}
}'
How to make the merge accept and my new setting ? are this is something related to throttling ?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 29, 2017, 7:57am UTC](https://discuss.elastic.co/t/how-to-make-the-es-merge-to-use-my-new-setting/105996/2 "2017-11-29T07:57:00Z")
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