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base repository: NpgsqlRest/NpgsqlRest
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  • 1 commit
  • 14 files changed
  • 1 contributor

Commits on Jun 1, 2026

  1. feat: v3.16.1 — cache stampede protection for cached routine responses 

    Make stampede protection actually fire for cached endpoints. The previous
IRoutineCache probe model (Get/AddOrUpdate) could not carry SQL execution as
the cache factory, so a burst of identical cold-cache requests executed the
query N times and could exhaust the Postgres connection pool.

- IRoutineCache.GetOrCreateAsync added as an additive default interface
  method, so existing custom backends keep working unchanged.
- Memory and Redis backends coalesce concurrent factory invocations via an
  in-flight Lazy<Task>; HybridCache delegates to its built-in GetOrCreateAsync.
- Scalar and passthrough proxy paths route through the factory, with the
  connection opened inside it so coalesced waiters never touch the DB.
- Records/sets streaming path uses a per-key execution gate, since it streams
  rows and disables caching above MaxCacheableRows; the gate serializes the
  over-limit case instead of coalescing.
- Tests assert execution counts on the memory backend (50->1, warm->+0,
  distinct keys, set within/over limit) against a live Postgres.

See changelog/v3.16.1.md for honest test-coverage notes and known limitations.
    @vbilopav
    vbilopav committed Jun 1, 2026
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