# How to find out stale alert rules

**URL:** <https://discuss.prometheus.io/t/how-to-find-out-stale-alert-rules/458>\
**Category:** Prometheus server\
**Created:** [August 13, 2021, 1:23pm UTC](https://discuss.prometheus.io/t/how-to-find-out-stale-alert-rules/458 "2021-08-13T13:23:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![chenlujjj](https://dub1.discourse-cdn.com/flex017/user_avatar/discuss.prometheus.io/chenlujjj/32/233_2.png) [@chenlujjj](https://discuss.prometheus.io/u/chenlujjj)\
**Post date:** [August 13, 2021, 1:23pm UTC](https://discuss.prometheus.io/t/how-to-find-out-stale-alert-rules/458/1 "2021-08-13T13:23:12Z")

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Hi everyone ! I have some questions about alert rules.

1. Are there any metrics about the total count of alert rules exposed by prometheus itself ?

2. How can I find out the stale or useless alert rules and then delete them to reduce the computation activity of prometheus ? In our use case, the alert rules which have been always evaluated as “nodata” are considered as useless.

Thanks !