# Kibana/Netflow bandwidth percentile calculation

**URL:** <https://discuss.elastic.co/t/kibana-netflow-bandwidth-percentile-calculation/172006>\
**Category:** Kibana\
**Tags:** elastic-stack-graph\
**Created:** [March 12, 2019, 4:36pm UTC](https://discuss.elastic.co/t/kibana-netflow-bandwidth-percentile-calculation/172006 "2019-03-12T16:36:30Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![OlSpurty](https://avatars.discourse-cdn.com/v4/letter/o/f14d63/32.png) [@OlSpurty](https://discuss.elastic.co/u/OlSpurty)\
**Post date:** [March 12, 2019, 4:36pm UTC](https://discuss.elastic.co/t/kibana-netflow-bandwidth-percentile-calculation/172006/1 "2019-03-12T16:36:30Z")

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Hello, and thanks in advance for any help.

I'm working on a bandwidth usage charting tool where I need to get a monthly percentile calculation, and am most of the way there - Here's what I have so far:

An Elastic Stack receiving Netflow data from a pfSense router. I have the first calculation that I need done, here's a screenshot of the result. For purposes of explaining my problem, I've zoomed way in to 5x points in my graph:

 ![05](https://us1.discourse-cdn.com/elastic/original/3X/f/0/f03217df59441c22237f8ef3c3659c3f32cc53ed.png)

I have two plots on that graph - The blue one is exactly what I want - It's the sum of all data usage in 5 minute intervals.

For the percentile calculation, the red line is as close as I've gotten, and it helps highlight the issue - It's taking the 95th percentile of the **individual** netflow entries - What I need is the 95th percentile of the 5-minute "buckets", or the points that make up the blue line.

95th percentile gets a bit weird for a plot with only 5 points, so lets say I was looking for the 75th percentile - In this example, I'd be looking for "384387", which is the 2nd highest value out of five.

On continuing to work on this, I was able to create a new visualization (Data Table type) that also makes me feel like I'm really close. It's basically the same thing as my TimeLion graph, but as a table. This also highlights the issue in a similar way: It's very easy to get a percentile of the individual values that make up each Bucket, but getting a percentile of the Buckets themselves proves challenging:

 ![16](https://us1.discourse-cdn.com/elastic/original/3X/e/0/e04a7cb87e6a1e17c7f05a5d5fc36496091b9bd9.png)

So far, I haven't found any way to accomplish this with Kibana and TimeLion. Any help would be greatly appreciated!

EDIT: one more clarification I thought I should add is that where I'm going with this is having 1 fixed percentile per month (and then down the road it will be one percentile per month per source IP, but I think I'm already good on knowing how to break it out by that). That percentile will be calculated from all of the 5-minute buckets for that month, and ideally I can just put that single value on the chart as a horizontal line.

here's the code from the first screenshot:

```auto
.elasticsearch(
    index="netflow-*", 
    metric="sum:netflow.bytes",
    split="netflow.src_addr:1",
    kibana=true)
.label(
    regex="^.* netflow.src_addr:(.+) > .*$",
    label="$1")
.yaxis(
    label="bytes / sec",
    min=0)
,
.elasticsearch(
    index="netflow-*", 
    metric="percentiles:netflow.bytes:95",
    split="netflow.src_addr:1",
    kibana=true)
.label(
    regex="^.* netflow.src_addr:(.+) > .*$",
    label="$1")

```

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<div class="post-metadata">

**Author:** ![OlSpurty](https://avatars.discourse-cdn.com/v4/letter/o/f14d63/32.png) [@OlSpurty](https://discuss.elastic.co/u/OlSpurty)\
**Post date:** [March 12, 2019, 4:38pm UTC](https://discuss.elastic.co/t/kibana-netflow-bandwidth-percentile-calculation/172006/2 "2019-03-12T16:38:48Z")

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On reviewing my post, I do see that a couple things changed between taking the first screenshot and pasting the code at the end. Either code should produce pretty much the same result, I just changed the labels to help clarify what the chart was showing.

---

<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:** [April 9, 2019, 4:53pm UTC](https://discuss.elastic.co/t/kibana-netflow-bandwidth-percentile-calculation/172006/3 "2019-04-09T16:53:19Z")

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