# Logstash worker parameter
**URL:** https://discuss.elastic.co/t/logstash-worker-parameter/60291
**Category:** Logstash
**Created:** [September 12, 2016, 1:12pm UTC](https://discuss.elastic.co/t/logstash-worker-parameter/60291 "2016-09-12T13:12:39Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@il.bert](https://discuss.elastic.co/u/il.bert)
#### Post date: [September 12, 2016, 1:12pm UTC](https://discuss.elastic.co/t/logstash-worker-parameter/60291/1 "2016-09-12T13:12:40Z")
Hi everybody, I am trying to tune my ELK stack, but I don't get the meaning of some parameters in logstash
I understood the PW process and main parameters of logstash, I was especially interested in thread management, but I still have one question: in a blog talking about PW and OW ([here](https://www.elastic.co/blog/a-history-of-logstash-output-workers)) I found that in version 2.4 you were going to remove the OW concept, has this been applied? I still find all the parameters there
Then while I was reading the doc on elastic output (the one i am using I found a value called workers ([here](https://www.elastic.co/guide/en/logstash/current/plugins-outputs-elasticsearch.html#plugins-outputs-elasticsearch-workers)) which meaning I don't get. it seems to me a little in contrast with PW and OW. could someone explain it better?
thanks
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### Author:  [@il.bert](https://discuss.elastic.co/u/il.bert)
#### Post date: [September 13, 2016, 3:08pm UTC](https://discuss.elastic.co/t/logstash-worker-parameter/60291/2 "2016-09-13T15:08:27Z")
hey any ideas of those parameters? I really can't find anything about them
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 4:38am UTC](https://discuss.elastic.co/t/logstash-worker-parameter/60291/3 "2017-07-06T04:38:44Z")