# Index in memory fluctuation

**URL:** <https://discuss.aerospike.com/t/index-in-memory-fluctuation/6056>\
**Category:** General Discussion\
**Created:** [March 25, 2019, 2:35pm UTC](https://discuss.aerospike.com/t/index-in-memory-fluctuation/6056 "2019-03-25T14:35:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![thiagoit](https://avatars.discourse-cdn.com/v4/letter/t/54ee81/32.png) [@thiagoit](https://discuss.aerospike.com/u/thiagoit)\
**Post date:** [March 25, 2019, 2:35pm UTC](https://discuss.aerospike.com/t/index-in-memory-fluctuation/6056/1 "2019-03-25T14:35:25Z")

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I am trying to understand how index in memory are managed, but have not found good explanation for that. Could some one help me?

In the Aerospike metrics I see no evictions. Expired objects follow a steady increasing pattern. But I see a sudden drop on number of objects and index in memory, even though not service was restarted in the cluster. What could cause that to happen?

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**Author:** ![Albot](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/albot/32/2076_2.png) [@Albot](https://discuss.aerospike.com/u/Albot)\
**Post date:** [March 26, 2019, 2:07am UTC](https://discuss.aerospike.com/t/index-in-memory-fluctuation/6056/2 "2019-03-26T02:07:16Z")

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I assume you mean data-in-index. Are you sure nothing restarted? Outside of restarts/expirations/evictions I can only assume someone pushed a delete