# Understanding Refresh Policy

**URL:** <https://community.dremio.com/t/understanding-refresh-policy/8611>\
**Category:** Uncategorized\
**Created:** [January 18, 2022, 8:44am UTC](https://community.dremio.com/t/understanding-refresh-policy/8611 "2022-01-18T08:44:51Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![borasy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/borasy/32/3633_2.png) [@borasy](https://community.dremio.com/u/borasy)\
**Post date:** [January 18, 2022, 8:44am UTC](https://community.dremio.com/t/understanding-refresh-policy/8611/1 "2022-01-18T08:44:51Z")

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Hi community,

When the Refresh Method is set to “Incremental update”, does the Refresh Policy: Expiration interval take effect or is it completely ignored?

Many thanks

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**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\
**Post date:** [January 20, 2022, 6:34am UTC](https://community.dremio.com/t/understanding-refresh-policy/8611/2 "2022-01-20T06:34:23Z")

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@borasy Interval settings should still apply, this is the frequency of refresh while incremental is the type, where Dremio will only refresh newly added rows since last refresh. We can decide to run the refresh at a frequency we desire but when it runs it will be incremental

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**Author:** ![borasy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/borasy/32/3633_2.png) [@borasy](https://community.dremio.com/u/borasy)\
**Post date:** [January 24, 2022, 3:48am UTC](https://community.dremio.com/t/understanding-refresh-policy/8611/3 "2022-01-24T03:48:26Z")

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Sure, but I’m talking about the Expiration interval not the Refresh interval.

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**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\
**Post date:** [January 27, 2022, 8:44am UTC](https://community.dremio.com/t/understanding-refresh-policy/8611/4 "2022-01-27T08:44:18Z")

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@borasy Expiration should be in effect too,

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**Author:** ![dacopan](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/dacopan/32/4289_2.png) [@dacopan](https://community.dremio.com/u/dacopan)\
**Post date:** [February 4, 2022, 1:44am UTC](https://community.dremio.com/t/understanding-refresh-policy/8611/5 "2022-02-04T01:44:18Z")

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I think that in this case, if expiration interval reached and increment data not success refreshed, the already exist data are not consider when run Querys?  
or wich are the effect that expiration time are reached

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**Author:** ![balaji.ramaswamy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/balaji.ramaswamy/32/843_2.png) [@balaji.ramaswamy](https://community.dremio.com/u/balaji.ramaswamy)\
**Post date:** [February 4, 2022, 4:09am UTC](https://community.dremio.com/t/understanding-refresh-policy/8611/6 "2022-02-04T04:09:57Z")

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@dacopan If the existing materialization is valid, then it will be considered