# Tag Change Missed Events

**URL:** <https://forum.inductiveautomation.com/t/tag-change-missed-events/37764>\
**Category:** Ignition\
**Created:** [August 15, 2020, 6:36pm UTC](https://forum.inductiveautomation.com/t/tag-change-missed-events/37764 "2020-08-15T18:36:41Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [August 18, 2020, 12:59pm UTC](https://forum.inductiveautomation.com/t/tag-change-missed-events/37764/13 "2020-08-18T12:59:57Z")

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Another tag script performance piece that may be affecting OP is that there is a dedicated thread pool size 3 that all tag change scripts are executed on. So in addition to having a per-tag queue of size 5 that events will sit in, there’s only ever 3 tag change scripts executing at once.

This is where you can really get into trouble with long running scripts (as @pturmel hinted), because if you have 3 long running scripts then nothing else is executing until at least one of them finishes.

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