# Tuning Elasticsearch system to again lost data

**URL:** <https://discuss.elastic.co/t/tuning-elasticsearch-system-to-again-lost-data/36337>\
**Category:** Elasticsearch\
**Created:** [December 4, 2015, 2:24am UTC](https://discuss.elastic.co/t/tuning-elasticsearch-system-to-again-lost-data/36337 "2015-12-04T02:24:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bachkhoabk47](https://avatars.discourse-cdn.com/v4/letter/b/e19adc/32.png) [@bachkhoabk47](https://discuss.elastic.co/u/bachkhoabk47)\
**Post date:** [December 4, 2015, 2:24am UTC](https://discuss.elastic.co/t/tuning-elasticsearch-system-to-again-lost-data/36337/1 "2015-12-04T02:24:35Z")

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Hello everybody  
I'm Tan and I come from Vietnam.  
You know, I would like to sent data from Syslog-ng to Elasticsearch with around 1 thousand message lines, but in ES side, I just see 515 docs. It means ES just received and processed haft past of the number messages that sent from Syslog-ng.  
I changed configuration and did sometimes and one of the case, I just saw the number of docs equal 10% the number of message come.

I have 5 ES node and 2 of them are data node with the configuration: 4GB RAM, 4 cores and data folder mount from NAS device.  
Of course, I also checked the bandwidth, hdd, ram and cpu. They worked well and just used around 50% their capacity.

I would like everyone give me some your experiences about that.  
Does has any parameters that I have to config for tuning my system?

Turning my system makes me spending alot of time. ☹  
Thank you very much!

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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 5, 2017, 11:33pm UTC](https://discuss.elastic.co/t/tuning-elasticsearch-system-to-again-lost-data/36337/2 "2017-07-05T23:33:40Z")

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Closed on July 5, 2017, 11:33pm UTC