# \[apm\]\[Help\]transactionSampleRate set to low whether exception information will be missed

**URL:** <https://discuss.elastic.co/t/apm-help-transactionsamplerate-set-to-low-whether-exception-information-will-be-missed/322988>\
**Category:** APM\
**Tags:** java\
**Created:** [January 12, 2023, 5:20am UTC](https://discuss.elastic.co/t/apm-help-transactionsamplerate-set-to-low-whether-exception-information-will-be-missed/322988 "2023-01-12T05:20:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ntmxglrtayl03](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ntmxglrtayl03/32/115075_2.png) [@ntmxglrtayl03](https://discuss.elastic.co/u/ntmxglrtayl03)\
**Post date:** [January 12, 2023, 5:20am UTC](https://discuss.elastic.co/t/apm-help-transactionsamplerate-set-to-low-whether-exception-information-will-be-missed/322988/1 "2023-01-12T05:20:26Z")

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I wanted to optimize performance by setting the sampling rate, but I was worried that I would miss exception messages from the program

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**Author:** ![Jack\_Shirazi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jack_shirazi/32/91641_2.png) [@Jack\_Shirazi](https://discuss.elastic.co/u/Jack_Shirazi)\
**Post date:** [January 12, 2023, 5:32pm UTC](https://discuss.elastic.co/t/apm-help-transactionsamplerate-set-to-low-whether-exception-information-will-be-missed/322988/2 "2023-01-12T17:32:15Z")

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The errors are propagated even if they are unsampled, so you should see them all regardless, eg I sample at 1% for a trace that is always generating an error, I see 3 traces but 300 errors

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**Author:** ![ntmxglrtayl03](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ntmxglrtayl03/32/115075_2.png) [@ntmxglrtayl03](https://discuss.elastic.co/u/ntmxglrtayl03)\
**Post date:** [January 13, 2023, 1:40am UTC](https://discuss.elastic.co/t/apm-help-transactionsamplerate-set-to-low-whether-exception-information-will-be-missed/322988/3 "2023-01-13T01:40:32Z")

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Thank you for your answer

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 2, 2023, 9:40pm UTC](https://discuss.elastic.co/t/apm-help-transactionsamplerate-set-to-low-whether-exception-information-will-be-missed/322988/4 "2023-02-02T21:40:55Z")

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