Alex Chi Z.

fix(pageserver): ensure test creates valid layer map

1

## Problem I'd like to add some constraints to the layer map we generate in tests. (1) is the layer map that the current compaction algorithm will produce. There is...

currently it does not work https://neondb.slack.com/archives/C033RQ5SPDH/p1719553893686989?thread_ts=1719403793.586119&cid=C033RQ5SPDH

feat(vm-monitor): allow LFC to grow above memory limit

1

## Problem vm-monitor limits the size of the LFC not go beyond `total_memory - reserved_memory`. With the not-that-recent experiment result, we can give customers better performance by increasing the LFC...

feat(pageserver): add k-merge image layer iterator with lazy loading

1

## Problem https://github.com/neondatabase/neon/issues/8002 ## Summary of changes ## Checklist before requesting a review - [ ] I have performed a self-review of my code. - [ ] If it is...

https://github.com/neondatabase/neon/pull/8103 adds bottom-most compaction for this unit test. We should use an LSN for the GC horizon instead of time to make the result comparable across runs.

LFC: using rolling hyperloglog for correct working set estimation

8

The current LFC uses hyperloglog to estimate the working set size, which does not correctly deal with deletes, and does not capture the working set size used in a window...