From 1e6c93250172946eeb38e94a92a1fd12c9d3011e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 7 Nov 2018 13:22:44 +0100 Subject: Merging upstream version 1.11.0+dfsg. Signed-off-by: Daniel Baumann --- web/api/queries/average/README.md | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 web/api/queries/average/README.md (limited to 'web/api/queries/average/README.md') diff --git a/web/api/queries/average/README.md b/web/api/queries/average/README.md new file mode 100644 index 000000000..3be434f68 --- /dev/null +++ b/web/api/queries/average/README.md @@ -0,0 +1,39 @@ +# Average or Mean + +> This query is available as `average` and `mean`. + +An average is a single number taken as representative of a list of numbers. + +It is calculated as: + +``` +average = sum(numbers) / count(numbers) +``` + +## how to use + +Use it in alarms like this: + +``` + alarm: my_alarm + on: my_chart +lookup: average -1m unaligned of my_dimension + warn: $this > 1000 +``` + +`average` does not change the units. For example, if the chart units is `requests/sec`, the result +will be again expressed in the same units. + +It can also be used in APIs and badges as `&group=average` in the URL. + +## Examples + +Examining last 1 minute `successful` web server responses: + +- ![](https://registry.my-netdata.io/api/v1/badge.svg?chart=web_log_nginx.response_statuses&options=unaligned&dimensions=success&group=min&after=-60&label=min) +- ![](https://registry.my-netdata.io/api/v1/badge.svg?chart=web_log_nginx.response_statuses&options=unaligned&dimensions=success&group=average&after=-60&label=average&value_color=orange) +- ![](https://registry.my-netdata.io/api/v1/badge.svg?chart=web_log_nginx.response_statuses&options=unaligned&dimensions=success&group=max&after=-60&label=max) + +## References + +- [https://en.wikipedia.org/wiki/Average](https://en.wikipedia.org/wiki/Average). -- cgit v1.2.3