# How do I drill down into the storage usage of my cluster?

**URL:** <https://discuss.elastic.co/t/how-do-i-drill-down-into-the-storage-usage-of-my-cluster/70091>\
**Category:** Elasticsearch\
**Created:** [December 27, 2016, 6:29pm UTC](https://discuss.elastic.co/t/how-do-i-drill-down-into-the-storage-usage-of-my-cluster/70091 "2016-12-27T18:29:09Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![mpenkov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mpenkov/32/9509_2.png) [@mpenkov](https://discuss.elastic.co/u/mpenkov)\
**Post date:** [December 27, 2016, 6:29pm UTC](https://discuss.elastic.co/t/how-do-i-drill-down-into-the-storage-usage-of-my-cluster/70091/1 "2016-12-27T18:29:09Z")

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From Marvel, I can tell that my cluster contains 240 million docs and 640GB. I'd like to drill down further into this, asking questions like:

- What is the average document size?
- What are the largest documents?
- Which fields occupy the most space?

I've tried to run an aggregation to answer the [first question](http://stackoverflow.com/questions/28335340/elasticsearch-get-average-document-length):

```
GET /profound_v2/urls/_search
{
  "query" : {"match_all" : {}},
  "aggs" : {"avg_size" : {"avg" : {"terms" : {"field" : "_size"}}}}
}

```

But I get an error:

```
  "root_cause": [
     {
        "type": "search_parse_exception",
        "reason": "Unexpected token START_OBJECT in [avg_size].",
        "line": 3,
        "col": 46
     }
  ]

```

Could someone please put me on the right track?

---

<div class="post-metadata">

**Author:** ![beiske](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/beiske/32/4042_2.png) [@beiske](https://discuss.elastic.co/u/beiske)\
**Post date:** [December 28, 2016, 4:58pm UTC](https://discuss.elastic.co/t/how-do-i-drill-down-into-the-storage-usage-of-my-cluster/70091/2 "2016-12-28T16:58:43Z")

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I've moved this to the Elasticsearch category since it is not specific to Elastic Cloud.

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<div class="post-metadata">

**Author:** ![beiske](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/beiske/32/4042_2.png) [@beiske](https://discuss.elastic.co/u/beiske)\
**Post date:** [January 2, 2017, 6:25pm UTC](https://discuss.elastic.co/t/how-do-i-drill-down-into-the-storage-usage-of-my-cluster/70091/4 "2017-01-02T18:25:59Z")

</div>



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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 5, 2017, 10:04pm UTC](https://discuss.elastic.co/t/how-do-i-drill-down-into-the-storage-usage-of-my-cluster/70091/5 "2017-07-05T22:04:34Z")

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