# Tuning transactor memory in Datomic Cloud

**URL:** <https://forum.datomic.com/t/tuning-transactor-memory-in-datomic-cloud/643>\
**Category:** Datomic Cloud\
**Created:** [October 11, 2018, 9:48pm UTC](https://forum.datomic.com/t/tuning-transactor-memory-in-datomic-cloud/643 "2018-10-11T21:48:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jocrau](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jocrau/32/141_2.png) [@jocrau](https://forum.datomic.com/u/jocrau)\
**Post date:** [October 11, 2018, 9:48pm UTC](https://forum.datomic.com/t/tuning-transactor-memory-in-datomic-cloud/643/1 "2018-10-11T21:48:23Z")

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The on-prem version allows to tune the [transactor memory](https://docs.datomic.com/on-prem/capacity.html#transactor-memory). Is this also possible in the cloud version?

I am particular interested in increasing the indexing performance which causes a lot of :cognitect.anomalies/busy.

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**Author:** ![marshall](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/marshall/32/48_2.png) [@marshall](https://forum.datomic.com/u/marshall)\
**Post date:** [November 8, 2018, 4:02pm UTC](https://forum.datomic.com/t/tuning-transactor-memory-in-datomic-cloud/643/2 "2018-11-08T16:02:31Z")

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Instance memory settings are not configurable in Datomic Cloud in the same way as they are in Datomic On-Prem.

We recently enabled the use of i3.xlarge instances for the primary compute group, which should provide additional computational and memory resources for systems that require them.

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**Author:** ![jocrau](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/jocrau/32/141_2.png) [@jocrau](https://forum.datomic.com/u/jocrau)\
**Post date:** [November 8, 2018, 7:20pm UTC](https://forum.datomic.com/t/tuning-transactor-memory-in-datomic-cloud/643/3 "2018-11-08T19:20:17Z")

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Thank you for the clarification.