# CPU while indexing Spikes

**URL:** <https://discuss.elastic.co/t/cpu-while-indexing-spikes/6142>\
**Category:** Elasticsearch\
**Created:** [December 13, 2011, 4:17pm UTC](https://discuss.elastic.co/t/cpu-while-indexing-spikes/6142 "2011-12-13T16:17:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![qwerty1411](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/qwerty1411/32/3041_2.png) [@qwerty1411](https://discuss.elastic.co/u/qwerty1411)\
**Post date:** [December 13, 2011, 4:17pm UTC](https://discuss.elastic.co/t/cpu-while-indexing-spikes/6142/1 "2011-12-13T16:17:49Z")

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I am using ES to search a couchdb. i am running it on a EC2 Mirco instance, ES v0.17.6, java v1.6. i am running only one node for a protoype before i start the actual product. I have encountered an issue when setting this up.

The issue that i encounter, is that while indexing, the CPU Spikes to to 100% and brings my server to crawl. I am indexing only about 192k docs, but this indexing has never actually finished. This CPU spikes sometimes gets so high that the server crashes, and when i restart ES, the river that i made is corrupted.

Any guidance to why this is happening?

i see error messages in the logs and then happen alot......

[2011-12-10 19:47:28,034][WARN][river.couchdb] [Sultan] [couchdb][lr] failed to executefailure in bulk execution:  
[2]: index [lr], type [lr], id [c6f81aec0e6387e0badc62c3d3c8c591], message [IndexFailedEngineException[[lr][4] Index failed for [lr#c6f81aec0e6387e0badc62c3d3c8c591]]; nested: IOException[No space left on device]; ]

-and-

org.elasticsearch.index.engine.IndexFailedEngineException: [lr][1] Index failed for [lr#c6f81aec0e6387e0badc62c3d3c8f17f]  
at org.elasticsearch.index.engine.robin.RobinEngine.index(RobinEngine.java:474)  
at org.elasticsearch.index.shard.service.InternalIndexShard.index(InternalIndexShard.java:303)  
at org.elasticsearch.action.bulk.TransportShardBulkAction.shardOperationOnPrimary(TransportShardBulkAction.java:131)  
at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction.performOnPrimary(TransportShardReplicationOperationAction.java:428)  
at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction$1.run(TransportShardReplicationOperationAction.java:341)  
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)  
at java.lang.Thread.run(Thread.java:636)  
Caused by: java.io.IOException: No space left on device  
at java.io.RandomAccessFile.writeBytes(Native Method)  
at java.io.RandomAccessFile.write(RandomAccessFile.java:499)  
at org.apache.lucene.store.FSDirectory$FSIndexOutput.flushBuffer(FSDirectory.java:448)  
at org.apache.lucene.store.BufferedIndexOutput.flushBuffer(BufferedIndexOutput.java:99)  
at org.apache.lucene.store.BufferedIndexOutput.flush(BufferedIndexOutput.java:88)  
at org.apache.lucene.store.BufferedIndexOutput.writeBytes(BufferedIndexOutput.java:77)  
at org.elasticsearch.index.store.support.AbstractStore$StoreIndexOutput.writeBytes(AbstractStore.java:470)  
at org.apache.lucene.store.DataOutput.writeBytes(DataOutput.java:43)  
at org.apache.lucene.store.RAMOutputStream.writeTo(RAMOutputStream.java:65)  
at org.apache.lucene.index.FieldsWriter.flushDocument(FieldsWriter.java:116)  
at org.apache.lucene.index.StoredFieldsWriter.finishDocument(StoredFieldsWriter.java:113)  
at org.apache.lucene.index.StoredFieldsWriter$PerDoc.finish(StoredFieldsWriter.java:152)  
at org.apache.lucene.index.DocumentsWriter$WaitQueue.writeDocument(DocumentsWriter.java:1398)  
at org.apache.lucene.index.DocumentsWriter$WaitQueue.add(DocumentsWriter.java:1418)  
at org.apache.lucene.index.DocumentsWriter.finishDocument(DocumentsWriter.java:1037)  
at org.apache.lucene.index.DocumentsWriter.updateDocument(DocumentsWriter.java:772)  
at org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:2056)  
at org.elasticsearch.index.engine.robin.RobinEngine.innerIndex(RobinEngine.java:561)  
at org.elasticsearch.index.engine.robin.RobinEngine.index(RobinEngine.java:469)  
... 7 more

---

<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, 3:45am UTC](https://discuss.elastic.co/t/cpu-while-indexing-spikes/6142/2 "2017-07-06T03:45:34Z")

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Closed on July 6, 2017, 3:45am UTC