# Elastic Backpressure on Logstash?
**URL:** https://discuss.elastic.co/t/elastic-backpressure-on-logstash/191696
**Category:** Elasticsearch
**Created:** [July 22, 2019, 6:10pm UTC](https://discuss.elastic.co/t/elastic-backpressure-on-logstash/191696 "2019-07-22T18:10:16Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Jitendra\_Kumhar](https://discuss.elastic.co/u/Jitendra_Kumhar)
#### Post date: [July 22, 2019, 6:10pm UTC](https://discuss.elastic.co/t/elastic-backpressure-on-logstash/191696/1 "2019-07-22T18:10:16Z")
I am sending data from various filebeats to two logstash machines and these machines send to ElasticSearch.
When I monitored network it shows 12 MiB/minute receiving and 5 MiB/minute(because I am using http\_compression maybe) outgoing.
I have persistent queue of 10 GB on logstash machine which gets filled very fast.
I cant figure out why is this happening.
So is this ElasticSearch back pressuring or something with logstash?
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### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [July 22, 2019, 9:14pm UTC](https://discuss.elastic.co/t/elastic-backpressure-on-logstash/191696/2 "2019-07-22T21:14:00Z")
Logstash is only able to send data as fast as Elasticsearch can accept it, and it sounds like back-pressure is being applied. What is the specification of your Elasticsearch cluster?
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### Author:  [@Jitendra\_Kumhar](https://discuss.elastic.co/u/Jitendra_Kumhar)
#### Post date: [July 23, 2019, 6:17am UTC](https://discuss.elastic.co/t/elastic-backpressure-on-logstash/191696/3 "2019-07-23T06:17:43Z")
4 data nodes with 32 GB Ram and 2 master nodes with 4 GB Ram.
I am sending to all 4 data nodes from logstash
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### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [July 23, 2019, 7:07am UTC](https://discuss.elastic.co/t/elastic-backpressure-on-logstash/191696/4 "2019-07-23T07:07:15Z")
How much CPU and what kind of storage? Local SSDs?
You should also always have at least 3 master eligible nodes in order to get a highly available cluster.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 20, 2019, 7:07am UTC](https://discuss.elastic.co/t/elastic-backpressure-on-logstash/191696/5 "2019-08-20T07:07:17Z")
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