v.windowPeriod in Flux queries in Chronograf 1.9 seems to be always 3ms

[tboehme]

I just updated to Chronograf to 1.9 (and InfluxDB 1.8.7) and tried to use some of the newly introduced variables in Flux queries.

Custom variables seem to work, but for some reason, v.windowPeriod seems to be "stuck" at 3ms, regardless of the start/stop time window. This results in very poor performance and out-of-memory issues when trying to plot multiple days of data.

Can somebody confirm that it actually works for them using Chronograf 1.9 and InfluxDb 1.8.7? Or is this a general issue?

[sranka]

Thank you for reporting an issue. I can reproduce this issue locally. The detection fails to recognize/compute the query interval, the derived interval is then 3ms by default. It also prints an error message to console:

Error: failed to analyze query
    at rangeTimes (durations.ts:140)
    at durations.ts:116
    at Array.map (<anonymous>)
    at allRangeTimes (durations.ts:116)
    at getMinDurationFromAST (durations.ts:28)
    at _callee$ (durations.ts:12)
    at tryCatch (runtime.js:63)
    at Generator.invoke [as _invoke] (runtime.js:293)
    at Generator.next (runtime.js:118)
    at fulfilled (durations.ts:2)

This is a chronograf issue, I am now trying to find a way to fix it.

[sranka]

As a workaround, until this is fixed, you can use dashboardTime in place of v.timeRangeStart and upperDashboardTime in place of v.timeRangeStop .

[tboehme]

Thanks for the prompt issue and the workaround.

If I use dashboardTime and upperDashboardTime, the initial calculation of v.windowPeriod seems to work, however, it does not change when I zoom in, so the resolution always stays the same and does not get refined when zooming.

[sranka]

If I use dashboardTime and upperDashboardTime, the initial calculation of v.windowPeriod seems to work, however, it does not change when I zoom in, so the resolution always stays the same and does not get refined when zooming.

Yes, it works this way, it is only a UI function that explores the existing result data, it does not re-execute the query.

[tboehme]

When using InfluxQL the variable :interval: does adapt when zooming and data is reloaded dynamically. For us this is an essential feature in the dashboards - in my opinion, it should behave the same when using Flux.

[sranka]

Thank you @tboehme for sharing the details. Please open a new defect regarding the zoom misfunction, this one is already focusing on a different defect.

[sranka]

When using InfluxQL the variable :interval: does adapt when zooming and data is reloaded dynamically. For us this is an essential feature in the dashboards - in my opinion, it should behave the same when using Flux.

I tried it locally with chronograf 1.8.8 and 1.9.0: When using InfluxQL, chronograf also does not reload data dynamically.

[tboehme]

Thanks @sranka for checking the refresh locally. With InfluxQL the refresh does work for me when zooming in Dashboards. It does not work in the explore view.

But I agree that this is a separate issue - I have opened the issue #5814 for it.