# Unregular load and merges

**URL:** <https://discuss.elastic.co/t/unregular-load-and-merges/22828>\
**Category:** Elasticsearch\
**Created:** [March 23, 2015, 3:26pm UTC](https://discuss.elastic.co/t/unregular-load-and-merges/22828 "2015-03-23T15:26:09Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Robert\_Fiser](https://avatars.discourse-cdn.com/v4/letter/r/e9c0ed/32.png) [@Robert\_Fiser](https://discuss.elastic.co/u/Robert_Fiser)\
**Post date:** [March 23, 2015, 3:26pm UTC](https://discuss.elastic.co/t/unregular-load-and-merges/22828/1 "2015-03-23T15:26:09Z")

</div>

We have 6 es nodes (cc2 8xlarge). Right now we're indexing about 5 billions  
documents to 87 different indexes each with one shard and replication 1.  
Documents are regularly distributed so there are no hotspots. Documents on  
each index/node grows with same speed but after 3 billions documents are  
written I see a strange think.  
One of the nodes has load 30 and the others under 10 and it seems that the  
same node doing the merges much more often than the others.

here is index settings:  
{  
"index" : {  
"compound\_on\_flush" : "false",  
"creation\_date" : "1426854580131",  
"number\_of\_replicas" : "1",  
"compound\_format" : "false",  
"uuid" : "XTUf5SLKSqCK2fWtkqkn1g",  
"number\_of\_shards" : "1",  
"refresh\_interval" : "-1",  
"version" : {  
"created" : "1040399"  
}  
}  
}

Do you have any idea why it's happening?

[https://lh6.googleusercontent.com/-WCkIvwBF2HY/VRAwQ4Xy3bI/AAAAAAAAABY/KM3UTktAKkM/s1600/FireShot%2BCapture%2B-%2Bkopf%2B-%2Bhttp\_\_\_solr-perf-test2.us-w2.aws.ccl\_9200\_\_plugin\_kopf\_%23!\_nodes.png](https://lh6.googleusercontent.com/-WCkIvwBF2HY/VRAwQ4Xy3bI/AAAAAAAAABY/KM3UTktAKkM/s1600/FireShot%2BCapture%2B-%2Bkopf%2B-%2Bhttp ___solr-perf-test2.us-w2.aws.ccl_9200__ plugin_kopf_%23%21_nodes.png)

[https://lh5.googleusercontent.com/-H4cUVNeyZCM/VRAwJlCCfRI/AAAAAAAAABQ/4Na4ZE6UfJo/s1600/FireShot%2BCapture%2B-%2BElasticsearch%2B-%2Bes-perf-test%2BDas\_%2B-%2Bhttp\_\_\_graphitus.us-w2.aws.ccl\_dashboard.html.png](https://lh5.googleusercontent.com/-H4cUVNeyZCM/VRAwJlCCfRI/AAAAAAAAABQ/4Na4ZE6UfJo/s1600/FireShot%2BCapture%2B-%2BElasticsearch%2B-%2Bes-perf-test%2BDas_%2B-%2Bhttp___graphitus.us-w2.aws.ccl_dashboard.html.png)

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---

<div class="post-metadata">

**Author:** ![Robert\_Fiser](https://avatars.discourse-cdn.com/v4/letter/r/e9c0ed/32.png) [@Robert\_Fiser](https://discuss.elastic.co/u/Robert_Fiser)\
**Post date:** [March 23, 2015, 3:28pm UTC](https://discuss.elastic.co/t/unregular-load-and-merges/22828/2 "2015-03-23T15:28:46Z")

</div>

about 12:00PM I've changed the index settings to

"index" : {  
"refresh\_interval" : "-1",  
"compound\_format" : "false",  
"compound\_on\_flush" : "false"  
}

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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 6, 2017, 12:24am UTC](https://discuss.elastic.co/t/unregular-load-and-merges/22828/3 "2017-07-06T00:24:48Z")

</div>

Closed on July 6, 2017, 12:24am UTC