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[DOC] Logging settings can affect performances (#12246) (#12247)

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Logging settings can affect performances
Backports #12246 to 7.x branch

Co-authored-by: Luca Belluccini <luca.belluccini@elastic.co>
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Karen Metts 2020-09-15 16:51:29 -04:00 • committed by GitHub
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@ -162,6 +162,24 @@ troubleshooting tips to share, please:
* create an issue at https://github.com/elastic/logstash/issues, or * create an issue at https://github.com/elastic/logstash/issues, or
* create a pull request with your proposed changes at https://github.com/elastic/logstash. * create a pull request with your proposed changes at https://github.com/elastic/logstash.
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[[ts-pipeline-logging-level-performance]]
=== Logging level can affect performances
*Symptoms*
Simple filters such as `mutate` or `json` filter can take several milliseconds per event to execute.
Inputs and outputs might be affected, too.
*Background*
The different plugins running on Logstash can be quite verbose if the logging level is set to `debug` or `trace`.
As the logging library used in Logstash is synchronous, heavy logging can affect performances.
*Solution*
Reset the logging level to `info`.
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[[ts-kafka]] [[ts-kafka]]
== Common Kafka support issues and solutions == Common Kafka support issues and solutions