# Metrics filter suggestions

**URL:** <https://discuss.elastic.co/t/metrics-filter-suggestions/817>\
**Category:** Logstash\
**Created:** [May 18, 2015, 2:38am UTC](https://discuss.elastic.co/t/metrics-filter-suggestions/817 "2015-05-18T02:38:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![allenmchan](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@allenmchan](https://discuss.elastic.co/u/allenmchan)\
**Post date:** [May 18, 2015, 2:38am UTC](https://discuss.elastic.co/t/metrics-filter-suggestions/817/1 "2015-05-18T02:38:10Z")

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Until [https://github.com/elastic/logstash/issues/2611](https://github.com/elastic/logstash/issues/2611) is resolved, i would like to use the metrics filter to push to ES the amount of syslog / lumberjack events processed by each of the logstash instances.

Does anyone know how this impacts the performance of the pipeline? I assume it doesn't slow down any event from moving between input \> filter \> output. I assume logstash just has a counter in memory and flushes that counter based on the configuration.

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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:** [July 6, 2017, 5:39am UTC](https://discuss.elastic.co/t/metrics-filter-suggestions/817/2 "2017-07-06T05:39:44Z")

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