# systemMemSizeMB flag - can it be set externally

**URL:** <https://forums.percona.com/t/systemmemsizemb-flag-can-it-be-set-externally/11367>\
**Category:** Percona Operator for MongoDB\
**Created:** [July 15, 2021, 8:33am UTC](https://forums.percona.com/t/systemmemsizemb-flag-can-it-be-set-externally/11367 "2021-07-15T08:33:36Z")\
**Posts on this page:** 1\
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**Author:** ![jamoser](https://avatars.discourse-cdn.com/v4/letter/j/b2d939/32.png) [@jamoser](https://forums.percona.com/u/jamoser)\
**Post date:** [July 21, 2021, 1:03pm UTC](https://forums.percona.com/t/systemmemsizemb-flag-can-it-be-set-externally/11367/4 "2021-07-21T13:03:37Z")

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May be as an input for others - to avoid the Memory Usage Peak, we load the databases on demand into MongoDB. This way we can have a lot fewer db’s active and in case a pod gets rescheduled, it need most likely much less memory.

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