# APM indexes created after an upgrade.. what are they? **URL:** \ **Category:** APM\ **Tags:** server\ **Created:** [August 6, 2020, 7:10pm UTC](https://discuss.elastic.co/t/apm-indexes-created-after-an-upgrade-what-are-they/244085 "2020-08-06T19:10:36Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jkaoiadjmdna](https://avatars.discourse-cdn.com/v4/letter/j/858c86/32.png) [@jkaoiadjmdna](https://discuss.elastic.co/u/jkaoiadjmdna)\ **Post date:** [August 6, 2020, 7:10pm UTC](https://discuss.elastic.co/t/apm-indexes-created-after-an-upgrade-what-are-they/244085/1 "2020-08-06T19:10:36Z")
When I upgrade a cluster in Elastic Cloud, it leaves behind these indexes. They're named like `apm--onboarding-` as-in `apm-7.4.2-onboarding-2019.11.04`. I couldn't find anywhere what the purpose of them is, or if I can remove them. Not causing any issues of course but they're piling up! ---
**Author:** ![gil](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/gil/32/41911_2.png) [@gil](https://discuss.elastic.co/u/gil)\ **Post date:** [August 6, 2020, 10:00pm UTC](https://discuss.elastic.co/t/apm-indexes-created-after-an-upgrade-what-are-they/244085/2 "2020-08-06T22:00:13Z")
The onboarding indexes contain a log of every [re]connection of apm-server to Elasticsearch primarily for use by the getting started guide and to aid in troubleshooting connectivity issues. Feel free to purge them aggressively. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 27, 2020, 6:00pm UTC](https://discuss.elastic.co/t/apm-indexes-created-after-an-upgrade-what-are-they/244085/3 "2020-08-27T18:00:13Z")
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