# \_type in FieldData

**URL:** <https://discuss.elastic.co/t/-type-in-fielddata/31661>\
**Category:** Elasticsearch\
**Created:** [October 5, 2015, 9:05pm UTC](https://discuss.elastic.co/t/-type-in-fielddata/31661 "2015-10-05T21:05:30Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![javadevmtl](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/javadevmtl/32/45613_2.png) [@javadevmtl](https://discuss.elastic.co/u/javadevmtl)\
**Post date:** [October 5, 2015, 9:05pm UTC](https://discuss.elastic.co/t/-type-in-fielddata/31661/1 "2015-10-05T21:05:30Z")

</div>

Using Elasticsearch 1.6 and looking at FieldData stats...  
Also using docs value when possible...

My Index has about 35,000,000 documents. So clearly the doc values are working as it looks like from below that the fielddata size for the fields is very small. But why is the \_type taking up so much ram? The docs don't mention anything about \_type being part of the field data.

```
  "myIndex": {
     "primaries": {
        "fielddata": {
           "memory_size_in_bytes": 30472436,
           "evictions": 0,
           "fields": {
              "field1": {
                 "memory_size_in_bytes": 2392
              },
              "field2": {
                 "memory_size_in_bytes": 3112
              },
              "field3": {
                 "memory_size_in_bytes": 1184
              },
              "_type": {
                 "memory_size_in_bytes": 30465748
              }
           }
        }
     }
```

---

<div class="post-metadata">

**Author:** ![javadevmtl](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/javadevmtl/32/45613_2.png) [@javadevmtl](https://discuss.elastic.co/u/javadevmtl)\
**Post date:** [October 5, 2015, 9:14pm UTC](https://discuss.elastic.co/t/-type-in-fielddata/31661/2 "2015-10-05T21:14:45Z")

</div>

Ok looked at the docs a bit regarding \_type.

The \_type field is indexed.

Can \_type be marked a a doc value also?

---

<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, 11:46pm UTC](https://discuss.elastic.co/t/-type-in-fielddata/31661/3 "2017-07-05T23:46:38Z")

</div>