# Number of fields and size

**URL:** <https://discuss.elastic.co/t/number-of-fields-and-size/247610>\
**Category:** Beats\
**Tags:** metricbeat\
**Created:** [September 5, 2020, 12:56am UTC](https://discuss.elastic.co/t/number-of-fields-and-size/247610 "2020-09-05T00:56:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![elasticforme](https://avatars.discourse-cdn.com/v4/letter/e/f05b48/32.png) [@elasticforme](https://discuss.elastic.co/u/elasticforme)\
**Post date:** [September 5, 2020, 12:56am UTC](https://discuss.elastic.co/t/number-of-fields-and-size/247610/1 "2020-09-05T00:56:08Z")

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if I turn on metricbeat by default it has more then 2000+ field.  
but if I am only monitoring system matric. will that empthy field that I saw in pattern will use space?

removing them is very time consuming exercise.

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [September 7, 2020, 2:01am UTC](https://discuss.elastic.co/t/number-of-fields-and-size/247610/2 "2020-09-07T02:01:27Z")

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Empty fields only take space in the mapping definition, but not in the stored fields.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 5, 2020, 4:01am UTC](https://discuss.elastic.co/t/number-of-fields-and-size/247610/3 "2020-10-05T04:01:54Z")

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