# Slowlog performance. could it deteriorate cluster's performance?

**URL:** <https://discuss.elastic.co/t/slowlog-performance-could-it-deteriorate-clusters-performance/215740>\
**Category:** Elasticsearch\
**Created:** [January 20, 2020, 1:11pm UTC](https://discuss.elastic.co/t/slowlog-performance-could-it-deteriorate-clusters-performance/215740 "2020-01-20T13:11:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rschirin](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rschirin/32/45283_2.png) [@rschirin](https://discuss.elastic.co/u/rschirin)\
**Post date:** [January 20, 2020, 1:11pm UTC](https://discuss.elastic.co/t/slowlog-performance-could-it-deteriorate-clusters-performance/215740/1 "2020-01-20T13:11:17Z")

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hi,  
currently I'm using the slowlog feature on cluster (3 master, 10 data, 2 coordinating only).  
These are my settings:

```
 "search" : {
      "slowlog" : {
        "level" : "trace",
        "threshold" : {
          "fetch" : {
            "warn" : "1s",
            "trace" : "200ms",
            "debug" : "500ms",
            "info" : "800ms"
          },
          "query" : {
            "warn" : "2000ms",
            "trace" : "500ms",
            "debug" : "1000ms",
            "info" : "1500ms"
          }
        }
      }
    }

```

Do you know anything about potential deterioration of cluster performance (I am referring to the cluster that generates slowlog data, not to my monitoring cluster)?  
Daily it will create index with `docs.count` 220k and `size` 1.2 gb.  
I removed the truncating character from` log4j.properties file`, so I do not truncate generated query after 1000 characters.

thanks

---

<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:** [February 17, 2020, 1:22pm UTC](https://discuss.elastic.co/t/slowlog-performance-could-it-deteriorate-clusters-performance/215740/2 "2020-02-17T13:22:59Z")

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Closed on February 17, 2020, 1:22pm UTC

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