From a9d3392f94132686b275595e7503eb8d35de5d84 Mon Sep 17 00:00:00 2001
From: snowrugar-beep <snowrugar-beep@users.noreply.github.com>
Date: Sat, 27 Jun 2026 06:24:41 +0000
Subject: [PATCH] fix: wire DB pool sizing via env (DATABASE_POOL_MIN/MAX,
 timeouts) (#526)

---
 app/backend/.env.example      |  7 +++++++
 app/backend/src/app.module.ts | 25 ++++++++++++++++++-------
 2 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/app/backend/.env.example b/app/backend/.env.example
index f96a39dc..07c03da2 100644
--- a/app/backend/.env.example
+++ b/app/backend/.env.example
@@ -17,6 +17,13 @@ DB_USER=postgres
 DB_PASS=postgres
 DB_NAME=gatherraa
 
+# Connection pool tuning (defaults are conservative; tune for your workload)
+DATABASE_POOL_MIN=2           # Minimum idle connections
+DATABASE_POOL_MAX=10          # Maximum pool size
+IDLE_TIMEOUT_MS=30000         # Close idle connections after this many ms
+STATEMENT_TIMEOUT_MS=5000     # Connection acquisition timeout in ms
+MAX_LIFETIME_MS=3600000       # Max connection lifetime in ms (1 hour)
+
 # ── Redis ────────────────────────────────────────────────────────────────────
 REDIS_URL=redis://localhost:6379
 REDIS_HOST=localhost
diff --git a/app/backend/src/app.module.ts b/app/backend/src/app.module.ts
index 9e11049f..a964f2e7 100644
--- a/app/backend/src/app.module.ts
+++ b/app/backend/src/app.module.ts
@@ -1,5 +1,5 @@
 import { Module, NestModule, MiddlewareConsumer } from '@nestjs/common';
-import { ConfigModule } from '@nestjs/config';
+import { ConfigModule, ConfigService } from '@nestjs/config';
 import { ScheduleModule } from '@nestjs/schedule';
 import { TypeOrmModule } from '@nestjs/typeorm';
 
@@ -16,12 +16,23 @@ import { VerificationHistory } from './identity-verification/entities/verificati
     ConfigModule.forRoot({
       isGlobal: true,
     }),
-    TypeOrmModule.forRoot({
-      type: 'sqlite',
-      database: ':memory:',
-      entities: [IdentityVerification, VerificationHistory],
-      synchronize: true,
-      retryAttempts: 0,
+    TypeOrmModule.forRootAsync({
+      inject: [ConfigService],
+      useFactory: (config: ConfigService) => ({
+        type: 'sqlite',
+        database: config.get<string>('DATABASE_PATH', ':memory:'),
+        entities: [IdentityVerification, VerificationHistory],
+        synchronize: true,
+        retryAttempts: 0,
+        // Pool sizing — defaults are conservative but tunable via env
+        extra: {
+          min: config.get<number>('DATABASE_POOL_MIN', 2),
+          max: config.get<number>('DATABASE_POOL_MAX', 10),
+          idleTimeoutMillis: config.get<number>('IDLE_TIMEOUT_MS', 30_000),
+          connectionTimeoutMillis: config.get<number>('STATEMENT_TIMEOUT_MS', 5_000),
+          maxLifetimeSeconds: config.get<number>('MAX_LIFETIME_MS', 3_600_000) / 1000,
+        },
+      }),
     }),
     ScheduleModule.forRoot(),
     IdentityVerificationModule,