I can't see the result of search on line chart

Elastic Stack Kibana
1

Hello.

I set up a system for mysql slow query log using ELK.
I made a dashboard which includes a result of search and line chart.
But I found recently some strange stuff.
I can found a result of search, but it didn't show line chart.
This line chart was made using same result of search.
Why it didn't show on line chart?

Thank you.

2

You might need more than one data point to draw that chart?