# maximumScreenSpaceError and maximumMemoryUsage

**URL:** <https://community.cesium.com/t/maximumscreenspaceerror-and-maximummemoryusage/23549>\
**Category:** CesiumJS\
**Created:** [April 20, 2023, 5:41am UTC](https://community.cesium.com/t/maximumscreenspaceerror-and-maximummemoryusage/23549 "2023-04-20T05:41:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rhea](https://avatars.discourse-cdn.com/v4/letter/r/3be4f8/32.png) [@Rhea](https://community.cesium.com/u/Rhea)\
**Post date:** [April 20, 2023, 5:41am UTC](https://community.cesium.com/t/maximumscreenspaceerror-and-maximummemoryusage/23549/1 "2023-04-20T05:41:23Z")

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Hi, I have questions regarding these parameters for a tileset. What exactly do those do when you increase/reduce the values and how do they help with optimization? I managed to load a previously crashing tileset by playing with these values but I would like to know what those parameters actually change.

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**Author:** ![Gabby\_Getz](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/gabby_getz/32/7838_2.png) [@Gabby\_Getz](https://community.cesium.com/u/Gabby_Getz)\
**Post date:** [April 24, 2023, 1:40pm UTC](https://community.cesium.com/t/maximumscreenspaceerror-and-maximummemoryusage/23549/2 "2023-04-24T13:40:18Z")

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Hi @Rhea,

- [Maximum Screen Space Error](https://cesium.com/learn/cesiumjs/ref-doc/Cesium3DTileset.html#maximumScreenSpaceError)— Increasing this value will request fewer high-resolution tiles, resulting in fewer network calls and less overall resources used.
  - Under the “Optimizations” section in this [Sandcastle Example](https://sandcastle.cesium.com/?src=3D%20Tiles%20Inspector.html), try adjusting the maximum screenspace error and other parameters to see their effect on tiles loaded.

- [Maximum Memory Usage](https://cesium.com/learn/cesiumjs/ref-doc/Cesium3DTileset.html#maximumMemoryUsage)— Currently as it is implemented, [it is a soft limit](https://github.com/CesiumGS/cesium/issues/6226) and does not guarantee that the limit will not ever be reached.