# \[INFO \]\[logstash.filters.multiline\] Grok loading patterns from file

**URL:** <https://discuss.elastic.co/t/info-logstash-filters-multiline-grok-loading-patterns-from-file/146115>\
**Category:** Logstash\
**Created:** [August 27, 2018, 6:42am UTC](https://discuss.elastic.co/t/info-logstash-filters-multiline-grok-loading-patterns-from-file/146115 "2018-08-27T06:42:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![talbehat](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/talbehat/32/84367_2.png) [@talbehat](https://discuss.elastic.co/u/talbehat)\
**Post date:** [August 27, 2018, 6:42am UTC](https://discuss.elastic.co/t/info-logstash-filters-multiline-grok-loading-patterns-from-file/146115/1 "2018-08-27T06:42:16Z")

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when this message is coming, does it take more cpu ?

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**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [August 27, 2018, 7:05am UTC](https://discuss.elastic.co/t/info-logstash-filters-multiline-grok-loading-patterns-from-file/146115/2 "2018-08-27T07:05:48Z")

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I'm not sure exactly what you're asking, but loading grok patterns from a file comes at a (very small) cost when Logstash starts up but the use of custom grok patterns while matching strings doesn't require any additional CPU.

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**Author:** ![talbehat](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/talbehat/32/84367_2.png) [@talbehat](https://discuss.elastic.co/u/talbehat)\
**Post date:** [August 27, 2018, 8:44am UTC](https://discuss.elastic.co/t/info-logstash-filters-multiline-grok-loading-patterns-from-file/146115/3 "2018-08-27T08:44:59Z")

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@magnusbaeck,

thanks

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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:** [September 24, 2018, 8:45am UTC](https://discuss.elastic.co/t/info-logstash-filters-multiline-grok-loading-patterns-from-file/146115/4 "2018-09-24T08:45:03Z")

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