Konstantin Knizhnik 417f37b2e8 Pass set of wanted image layers from GC to compaction (#3673) ...

## Describe your changes

Right now the only criteria for image layer generation is number of
delta layer since last image layer.
If we have "stairs" layout of delta layers (see link below) then it can
happen that there a lot of old delta layers which can not be reclaimed
by GC because are not fully covered with image layers.

This PR constructs list of "wanted" image layers in GC (which image
layers are needed to be able to remove old layers)
and pass this list to compaction task which performs generation of image
layers.
So right now except deltas count criteria we also take in account
"wishes" of GC.

## Issue ticket number and link

See 
https://neondb.slack.com/archives/C033RQ5SPDH/p1676914249982519


## Checklist before requesting a review
- [ ] I have performed a self-review of my code.
- [ ] If it is a core feature, I have added thorough tests.
- [ ] Do we need to implement analytics? if so did you add the relevant
metrics to the dashboard?
- [ ] If this PR requires public announcement, mark it with
/release-notes label and add several sentences in this section.

---------

Co-authored-by: Joonas Koivunen <joonas@neon.tech>
Co-authored-by: Heikki Linnakangas <heikki@neon.tech>

2023-05-24 08:01:41 +03:00

..

benches

revert: "Add check for duplicates of generated image layers" (#4104)

2023-04-28 17:20:18 +03:00

fixtures

walredo: simple tests and bench updates (#3045)

2023-01-16 18:24:45 +02:00

src

Pass set of wanted image layers from GC to compaction (#3673)

2023-05-24 08:01:41 +03:00

Cargo.toml

feat(page_service): read timeouts (#4093)

2023-04-27 17:55:35 +00:00