From e7a66c44cf48dfabf874218176a33b8622bebcad Mon Sep 17 00:00:00 2001
From: Arthur Belleville <arthur.belleville@datadoghq.com>
Date: Fri, 15 May 2026 18:55:40 +0200
Subject: [PATCH] fix(07): WR-03 add SetMaxOpenConns(2) on migration sql.DB
 pool

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
---
 backend/internal/db/migrate.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/backend/internal/db/migrate.go b/backend/internal/db/migrate.go
index 34e077f..abe48d6 100644
--- a/backend/internal/db/migrate.go
+++ b/backend/internal/db/migrate.go
@@ -28,6 +28,7 @@ func RunMigrations(ctx context.Context, pool *pgxpool.Pool, migrationsFS embed.F
 	if err != nil {
 		return fmt.Errorf("migrate: open sql.DB: %w", err)
 	}
+	sqlDB.SetMaxOpenConns(2) // goose runs sequentially — no need for a large pool
 	defer sqlDB.Close()
 
 	// Point goose at the embedded FS so no on-disk files are needed.