# Understanding doc\_count\_error\_upper\_bound
**URL:** https://discuss.elastic.co/t/understanding-doc-count-error-upper-bound/117877
**Category:** Elasticsearch
**Created:** [January 31, 2018, 7:09pm UTC](https://discuss.elastic.co/t/understanding-doc-count-error-upper-bound/117877 "2018-01-31T19:09:23Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@javadevmtl](https://discuss.elastic.co/u/javadevmtl)
#### Post date: [January 31, 2018, 7:09pm UTC](https://discuss.elastic.co/t/understanding-doc-count-error-upper-bound/117877/1 "2018-01-31T19:09:24Z")
So I read the docs but still a bit confused, or it's just not clicking....
If I use `size: 512` I get `doc_count_error_upper_bound: 45` and `sum_other_doc_count: 29728`
If I use `size: 8192` (YES I know I should NOT use large numbers, just testing) I get `doc_count_error_upper_bound: 0` and `sum_other_doc_count: 0` which gives me an exact key count of 9.
So...
Does the result below with `size: 512` mean,
- that it has found 3 actual duplicates.
- 29728 where NOT used to find the 3 duplicates?
- 45 out of the total 75833 are potentially duplicates?
Request:
```
POST xxxxxx-2018.*/_search
{
"query": {
"bool": {
"must": [
{
"match": {
"message": "lookup"
}
}
],
"must_not": []
}
},
"size": 0,
"aggs": {
"duplicateNames": {
"terms": {
"field": "utid.keyword",
"min_doc_count": 2,
"size": 512,
"show_term_doc_count_error": false
}
}
}
}
```
Response:
```
{
"took": 128,
"timed_out": false,
"_shards": {
"total": 155,
"successful": 155,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 75833,
"max_score": 0,
"hits": []
},
"aggregations": {
"duplicateNames": {
"doc_count_error_upper_bound": 45,
"sum_other_doc_count": 29728,
"buckets": [
{
"key": "0d6d614c-e515-4449-9947-f662646c32f7",
"doc_count": 2
},
{
"key": "32465f7c-4f15-4012-a285-e3f6ad890882",
"doc_count": 2
},
{
"key": "f6d874a9-cfa9-4907-99ee-00215de0136f",
"doc_count": 2
}
]
}
}
}
```
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 28, 2018, 7:09pm UTC](https://discuss.elastic.co/t/understanding-doc-count-error-upper-bound/117877/2 "2018-02-28T19:09:43Z")
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