5080: Fix getting a single batch through the GET route r=Kerollmops a=dureuill
# Pull Request
## Related issue
Fixes a bug where getting a single batch does not work
Related to #5070
fix by `@Kerollmops`
Co-authored-by: Louis Dureuil <louis@meilisearch.com>
4900: Indexer edition 2024 r=Kerollmops a=dureuill
This PR is implementing the indexer edition 2024, largely inspired by [the ideas from this blog post](https://blog.kerollmops.com/meilisearch-is-too-slow).
Fixes https://github.com/meilisearch/meilisearch/issues/4985
## Features
- Stream-first approach to reading documents.
- Minimum disk write operations.
- RAM usage-first approach to avoid modifying common bitmaps on disk but in memory.
- Reduced LMDB fragmentation by writing entries only once...
- ...computing the final version of the entries in parallel...
- ...and storing them in write-optimized data structures before sending them to the BTree (LMDB).
- Indexing in multiple transactions to improve large dataset support (dumps).
Co-authored-by: ManyTheFish <many@meilisearch.com>
Co-authored-by: Clément Renault <clement@meilisearch.com>
Co-authored-by: Louis Dureuil <louis@meilisearch.com>
* Remove unreachable code
* Add `indices` field to `MatchBounds`
For matches inside arrays, this field holds the indices of the array
elements that matched. For example, searching for `cat` inside
`{ "a": ["dog", "cat", "fox"] }` would return `indices: [1]`. For nested
arrays, this contains multiple indices, starting with the one for the
top-most array. For matches in fields without arrays, `indices` is not
serialized (does not exist) to save space.
5044: Adds new metrics to prometheus r=irevoire a=PedroTurik
not 100% confident in this solution, especially because i couldn't make the "Search Queue searches waiting" metric give me any value other than 0 with my local testing 😆. But i believe it solves the Issue.
# Pull Request
## Related issue
Fixes#4998
## What does this PR do?
### Adds new metrics to prometheus;
- SearchQueue size,
- SearchQueue searches running,
- and Search Queue searches waiting.
## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?
Co-authored-by: Pedro Turik Firmino <pedroturik@gmail.com>
