Why is the picture changing so much every time refresh?

This problem was actually discovered in a very early version. I really can’t stand it today.
see pic, refresh 3 times, 3 different grah

Hi Fan !
It’s good to see you again )
Can you do our search simpler and let us know What Dashboard and Panel and what “interval” selected?

Thanks!

Hi roma.novikov !
Yesterday’s picture is my own dashboard, actually copying the mysql overview->mysql client thread acitivity json code,the interval is 5s, refresh every 10s.
Today I intercepted a gif and you can see the curve change of the mysql question panal(from the mysql overview dashboard), interval is auto, refresh every 5s

The picture is compressed, watch the video.
http://t.cn/E5uRhEa?m=4331936409344895&u=1278787855

I can’t load the gif but can see what you are getting on https://pmmdemo.percona.com/graph/d/MQWgroiiz/mysql-overview?refresh=10s&panelId=10&fullscreen&orgId=1&from=now-15m&to=now&var-interval=5s&var-host=ps57

The reason is - how Prometheus calculating and Grafana passing intervals. (this will be changed in future versions)
SO every 10 sec 5 sec internal moved to 5 sec and max and average values are different

If you select 1 sec interval - everything will be better )
or if you’ll have a longer interval

I understand, Thank you roma.novikov