# 10min\_cpu\_iowait but my CPU(s) are not showing anything that correlates to what Netdata warns me

**URL:** <https://community.netdata.cloud/t/10min-cpu-iowait-but-my-cpu-s-are-not-showing-anything-that-correlates-to-what-netdata-warns-me/2504>\
**Category:** Help\
**Tags:** agent-alarms, agent\
**Created:** [February 1, 2022, 2:24pm UTC](https://community.netdata.cloud/t/10min-cpu-iowait-but-my-cpu-s-are-not-showing-anything-that-correlates-to-what-netdata-warns-me/2504 "2022-02-01T14:24:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![thomasmerz](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.netdata.cloud/thomasmerz/32/1449_2.png) [@thomasmerz](https://community.netdata.cloud/u/thomasmerz)\
**Post date:** [February 1, 2022, 2:24pm UTC](https://community.netdata.cloud/t/10min-cpu-iowait-but-my-cpu-s-are-not-showing-anything-that-correlates-to-what-netdata-warns-me/2504/1 "2022-02-01T14:24:02Z")

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Hi there,

## Environment

I’m running Netdata in a docker container and let it update-check on a daily basis:  
`docker pull netdata/netdata && docker stop netdata && docker rm netdata && docker run -d --name=netdata …`  
⚠ This might have been happened shortly after I got the warning below…!?

## Problem/Question

Starting some days ago (Jan, 30th) I got this warning from one of my netdata-agents:

- 10min\_cpu\_iowait with 40.63 %
- some minute later: a clear messages/info-mail 10min\_cpu\_iowait with 16.59 %
- some hours later: another warning 10min\_cpu\_iowait with 40.54 %

## What I expected to happen

As I can see in my “System Overview” iowait is not significantly high, so that I’m still missing the finale clear messages/info-mail.

Why does it not clear this warning? And/or how can I clear this manually?

Kind regards  
Thomas

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<div class="post-metadata">

**Author:** ![ilyam8](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.netdata.cloud/ilyam8/32/134_2.png) [@ilyam8](https://community.netdata.cloud/u/ilyam8)\
**Post date:** [February 1, 2022, 6:31pm UTC](https://community.netdata.cloud/t/10min-cpu-iowait-but-my-cpu-s-are-not-showing-anything-that-correlates-to-what-netdata-warns-me/2504/2 "2022-02-01T18:31:15Z")

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Hi, @thomasmerz.

`10min_cpu_iowait` alarm [has](https://github.com/netdata/netdata/blob/8d1aac7a15466fdc9f9b466ecd2f05be9ea5b822/health/health.d/cpu.conf#L32) `delay` option, which affects sending notifications (adds a delay as you may guess):

> delay: down 15m multiplier 1.5 max 1h

See the [option description](https://learn.netdata.cloud/docs/agent/health/reference#alarm-line-delay) in our documentation.

* * *

And as we [found out in your other topic](https://community.netdata.cloud/t/system-clock-sync-state-on-macos-12-2/2506/2): if you install Netdata in a container on macOS you monitor Linux VM, not the host.

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<div class="post-metadata">

**Author:** ![thomasmerz](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.netdata.cloud/thomasmerz/32/1449_2.png) [@thomasmerz](https://community.netdata.cloud/u/thomasmerz)\
**Post date:** [February 1, 2022, 9:22pm UTC](https://community.netdata.cloud/t/10min-cpu-iowait-but-my-cpu-s-are-not-showing-anything-that-correlates-to-what-netdata-warns-me/2504/3 "2022-02-01T21:22:20Z")

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In this case this is a “normal” Linux VM running a Netdata Agent in a Docker Container 😉

Many thanks for this computational aid 🙂 Just that I have understood it correctly:  
The warning will only be cleared, if there had been or will be a period of at least 22 minutes and 30 seconds (15 mins x 1,5) without a high iowait-timeframe again (which is currently not the case - so everything seems to be fine with Netdata and I have now a better understanding).