# Logstash to elasticsearch TCP connection limit

**URL:** <https://discuss.elastic.co/t/logstash-to-elasticsearch-tcp-connection-limit/193323>\
**Category:** Elasticsearch\
**Created:** [August 1, 2019, 12:55pm UTC](https://discuss.elastic.co/t/logstash-to-elasticsearch-tcp-connection-limit/193323 "2019-08-01T12:55:59Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ravitandur](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ravitandur/32/4568_2.png) [@ravitandur](https://discuss.elastic.co/u/ravitandur)\
**Post date:** [August 1, 2019, 12:55pm UTC](https://discuss.elastic.co/t/logstash-to-elasticsearch-tcp-connection-limit/193323/1 "2019-08-01T12:55:59Z")

</div>

We are using elasticsearch output in logstash. What we are observing during the peak load is, from one logstash node it is able to establish only 400 TCP connections to elasticsearch nodes. Why it is not going beyond 400 TCP connections? was there any settings we need to change if we want to go beyond 400 TCP connections.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 29, 2019, 12:56pm UTC](https://discuss.elastic.co/t/logstash-to-elasticsearch-tcp-connection-limit/193323/2 "2019-08-29T12:56:00Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.