# Entities Excision doesn’t take effect

**URL:** <https://forum.datomic.com/t/entities-excision-doesn-t-take-effect/1440>\
**Category:** Troubleshooting\
**Created:** [May 4, 2020, 12:24pm UTC](https://forum.datomic.com/t/entities-excision-doesn-t-take-effect/1440 "2020-05-04T12:24:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jaret](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jaret/32/45_2.png) [@jaret](https://forum.datomic.com/u/jaret)\
**Post date:** [May 8, 2020, 2:12pm UTC](https://forum.datomic.com/t/entities-excision-doesn-t-take-effect/1440/2 "2020-05-08T14:12:31Z")

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Cross posting my reply on the other thread:

> [@Entities Excision doesn't take effect](https://forum.datomic.com/t/entities-excision-doesnt-take-effect/1434/2):
>
> @Devyn Datomic On-prem’s Excision is unsuitable for the error-correcting task, as it does not restore any prior view of the facts. It’s also not suitable as a disk size cleanup and should be used sparingly as excision will put a substantial burden on background indexing. [https://docs.datomic.com/on-prem/excision.html](https://docs.datomic.com/on-prem/excision.html) space did not free up Is your goal here to clear up space or to removing data for privacy reasons/removing data older than some domain-defined retention period? If your goal…

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