# Historian logging more than it should for on change

**URL:** <https://forum.inductiveautomation.com/t/historian-logging-more-than-it-should-for-on-change/76976>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [July 26, 2023, 9:35pm UTC](https://forum.inductiveautomation.com/t/historian-logging-more-than-it-should-for-on-change/76976 "2023-07-26T21:35:26Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MSI\_EXP\_Auto](https://avatars.discourse-cdn.com/v4/letter/m/fbc32d/32.png) [@MSI\_EXP\_Auto](https://forum.inductiveautomation.com/u/MSI_EXP_Auto)\
**Post date:** [July 26, 2023, 9:35pm UTC](https://forum.inductiveautomation.com/t/historian-logging-more-than-it-should-for-on-change/76976/1 "2023-07-26T21:35:26Z")

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I was doing some scripting with the tag historian functions and noticed something unexpected in a result so I queried the actual historian table and found that a tag I have set to log on change seems to be logging more frequently, here is the result of my query - ![](data:image/png;base64,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)

Any ideas why I would see this? These are the history settings for the tag -  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/2/52f6d814318b4cc2f44eb21c9746d499054bf80f.png)

---

<div class="post-metadata">

**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [July 26, 2023, 9:57pm UTC](https://forum.inductiveautomation.com/t/historian-logging-more-than-it-should-for-on-change/76976/2 "2023-07-26T21:57:37Z")

</div>

You're not using [storeTagHistory](https://docs.inductiveautomation.com/display/DOC81/system.tag.storeTagHistory) anywhere?

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<div class="post-metadata">

**Author:** ![MSI\_EXP\_Auto](https://avatars.discourse-cdn.com/v4/letter/m/fbc32d/32.png) [@MSI\_EXP\_Auto](https://forum.inductiveautomation.com/u/MSI_EXP_Auto)\
**Post date:** [July 27, 2023, 7:47pm UTC](https://forum.inductiveautomation.com/t/historian-logging-more-than-it-should-for-on-change/76976/3 "2023-07-27T19:47:31Z")

</div>

No it should not be.
