ea7bae9a71
5356: Display the internal indexing steps with timings on the `/batches` route r=irevoire a=Kerollmops
This PR computes the durations of each step, stores them in a map, and prints them (for now).
```
"callTrace": {
"processing tasks > retrieving config": "185.38µs",
"processing tasks > computing document changes > preparing update file > payload": "23.11ms",
"processing tasks > computing document changes > preparing update file": "23.26ms",
"processing tasks > computing document changes": "24.06ms",
"processing tasks > indexing > extracting documents > document": "15.13ms",
"processing tasks > indexing > extracting documents": "15.13ms",
"processing tasks > indexing > extracting facets > document": "5.70ms",
"processing tasks > indexing > extracting facets": "5.72ms",
"processing tasks > indexing > extracting words > document": "597.24ms",
"processing tasks > indexing > extracting words": "597.25ms",
"processing tasks > indexing > extracting word proximity > document": "1.14s",
"processing tasks > indexing > extracting word proximity": "1.15s",
"processing tasks > indexing > tail writing to database": "430.91ms",
"processing tasks > indexing > waiting for extractors": "52.54µs",
"processing tasks > indexing > writing embeddings to database": "47.79µs",
"processing tasks > indexing > post-processing facets": "476.04µs",
"processing tasks > indexing > post-processing words": "97.82ms",
"processing tasks > indexing > finalizing": "67.41ms",
"processing tasks > indexing": "2.40s",
"processing tasks": "2.43s",
"writing tasks to disk > task": "37.71µs",
"writing tasks to disk": "67.13µs"
},
"writeChannelCongestion": {
"attempts": 2608482,
"blocking_attempts": 0,
"blocking_ratio": 0.0
}
```
## To Do
- [x] Update the batches PRD + delivery + tracking issue.
- [x] Store that in the batches to be visible from the `/batches` route.
- [x] Display the writer's congestion.
- [x] Display the info back in the logs too.
- [ ] (optional) Compute the size of each database by [using LMDB](https://docs.rs/heed/latest/heed/struct.DatabaseStat.html).
- [x] Push them in reverse order so that "processing task" is after the other sub-steps.
Co-authored-by: Kerollmops <clement@meilisearch.com>
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