feat(dashboard): visualize average backpressure rather than spot backpressure #18219
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Started
2024-08-24 08:21:47
ago
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Details
Required Tasks
| Task | Status |
|---|---|
Poll the actor_buffer_output_blocking_ns metric from meta / prometheus at a fixed duration (5s). |
Incomplete |
After polling, get the difference between previous and current blocking_duration. |
Incomplete |
| Then backpressure rate is calculated as: | Incomplete |
This means if the blocking duration is a few minutes, it will show up on the graph for 5s, but in the subsequent epoch, it shows up 0, since actor_buffer_output_blocking_ns will ONLY be incremented after the chunk has been yielded downstream. |
Incomplete |
| It is very easy to miss as a result, and does not reflect the stuck state of the actor. This becomes worse if the stream job contains a large number of fragments. | Incomplete |
| I have written necessary rustdoc comments | Incomplete |
| I have added necessary unit tests and integration tests | Incomplete |
| I have added test labels as necessary. See details. | Incomplete |
| I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features #7934). | Incomplete |
| My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future). | Incomplete |
All checks passed in ./risedev check (or alias, ./risedev c) |
Incomplete |
| My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details) | Incomplete |
| My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users) | Incomplete |
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