Optimize latest guardian health view by fparisotto · Pull Request #118 · fedimint/fedimint-observer

fparisotto · 2026-07-06T13:28:23Z

Summary

redefine latest_guardian_health with a lateral latest-time lookup per federation
avoid aggregating the full guardian_health history on every view read
add the view change as migration v9

The new query shape lets PostgreSQL use the existing (federation_id, time) index with a backward index scan for each federation.

git diff --check
verified the same query shape with EXPLAIN against a large production-like database in downstream deployment
local cargo check was skipped; CI should validate the branch

nixpkgs removed nodePackages in favor of top-level packages.

fparisotto and others added 5 commits July 6, 2026 10:28

chore: optimize latest guardian health view

006fd22

ci: re-trigger checks (previous run hit GitHub outage)

9941caa

chore: update flake.lock to fix stale nixpkgs (133 days → current)

17dfc72

fix: replace removed nodePackages.tailwindcss with tailwindcss

f9585c7

nixpkgs removed nodePackages in favor of top-level packages.

ci: re-trigger (GitHub cache outage)

a58f940