# Delete unnecessary mappings from a given index
**URL:** https://discuss.elastic.co/t/delete-unnecessary-mappings-from-a-given-index/305612
**Category:** Elasticsearch
**Created:** [May 25, 2022, 12:46pm UTC](https://discuss.elastic.co/t/delete-unnecessary-mappings-from-a-given-index/305612 "2022-05-25T12:46:31Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@nunex\_17](https://discuss.elastic.co/u/nunex_17)
#### Post date: [May 25, 2022, 12:46pm UTC](https://discuss.elastic.co/t/delete-unnecessary-mappings-from-a-given-index/305612/1 "2022-05-25T12:46:31Z")
Hi,
I have an index template called "suricata-ids" created by default from Filebeat. This index template has many fields that are simply not used by the suricata logs. How can i delete that unnecessary fields? Is it possible? It improves performance?
Thanks you
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [May 25, 2022, 11:43pm UTC](https://discuss.elastic.co/t/delete-unnecessary-mappings-from-a-given-index/305612/2 "2022-05-25T23:43:33Z")
It's not worth deleting extra fields for older indices. You should look at customising the index template to remove the fields you don't want for future indices.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 22, 2022, 11:44pm UTC](https://discuss.elastic.co/t/delete-unnecessary-mappings-from-a-given-index/305612/3 "2022-06-22T23:44:19Z")
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