# Visualize DiskIO as percentages

**URL:** <https://discuss.elastic.co/t/visualize-diskio-as-percentages/185708>\
**Category:** Kibana\
**Created:** [June 13, 2019, 5:21pm UTC](https://discuss.elastic.co/t/visualize-diskio-as-percentages/185708 "2019-06-13T17:21:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dnwobu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dnwobu/32/43517_2.png) [@dnwobu](https://discuss.elastic.co/u/dnwobu)\
**Post date:** [June 13, 2019, 5:21pm UTC](https://discuss.elastic.co/t/visualize-diskio-as-percentages/185708/1 "2019-06-13T17:21:12Z")

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Hello,

I'm using Kibana 7.

I'd like to show R/W IOPS as a % of the total IOPS and the same thing for R/W MB/s. I started off using the Disk IO (Bytes) [Metricbeat System] ECS Visual Builder visualization as a starting point. I tried using Max -\> Derivative -\> Math aggregations and used the following expression:

divide(params.\_all.reads.values, add(params.\_all.reads.values, params.\_all.writes.values))

But I'm not getting any data in the chart. Below is a screenshot of the window:

 ![read%20write%20percent](https://us1.discourse-cdn.com/elastic/original/3X/8/b/8bf8982ae6bcc8dc393d301dcf87221745810d6c.png) ![read%20write%20percent-2](https://us1.discourse-cdn.com/elastic/original/3X/5/5/5555995effe525e606d07bbf3168f21924b1f0a0.png)

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<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:** [July 11, 2019, 5:21pm UTC](https://discuss.elastic.co/t/visualize-diskio-as-percentages/185708/2 "2019-07-11T17:21:15Z")

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