Instance Metrics using OxQL

[charliepark]

Still very much in flux; creating a draft PR for easier comparing/contrasting/discussing.

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[david-crespo]

Once you have something basically working (you might already, I didn’t check) it might be worth looking at getting better mock data to make iteration and testing easier. One way to start would be to take a real response for a decent sized time range and hard code it as a mock response, filtered by the time range extracted from the OxQL query with regexes. It’ll be janky but the goal is to be just complex enough to support testing the UI.

[benjaminleonard]

Once you have something basically working (you might already, I didn’t check) it might be worth looking at getting better mock data to make iteration and testing easier.

That's probably better, to get something more accurate.

I have a silly alternative that could work. By modifying the generateUtilization function to walk deterministically based on the time. We interpolate between the start and end time (maybe snap to nearest n time) – and use that as the seed for for the randomness, so even as the relative time moves the values stay consistent.

[charliepark]

It's coming along; will push latest shortly. I had been originally trying to map the existing charts, but chatted with @bnaecker on Friday, and he noted that showing the data as it comes through from OxQL will be a bit more useful to people.

Regarding the existing (top) and new (bottom) charts …

Ben noted …

Folks generally want to know "when was my disk busy", or "how many ops were in this period". To answer that in the bottom, you just look at those spikes. To answer that in the top, you have to look at the periods where the slope is high.

Two instances to check out from dogfood to see read data:

• https://localhost:4000/projects/try/instances/mongodb-xfs-bs4096-primary/metrics
• https://localhost:4000/projects/alan/instances/d41clone/metrics

Alan noted that Crucible is having some issues writing write data, so the writes charts aren't useful right now.

[david-crespo]

Looks fantastic. Glad the data is more useful!

[benjaminleonard]

Making note of a few polish things would be nice to get in:

1. Loading state
2. Error state
3. Feedback on the refresh button
4. Empty state
5. Y axis auto width
6. Style OxQL button (design has this as a dropdown – we could potentially have CLI command copy in here too? Or "Docs" that takes you to the associated section, e.g. virtual_disk:reads