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Enhance database connection management by introducing configurable pool settings and implementing a retry mechanism for transient connection issues. Updated Sequelize pool options to use environment variables for better flexibility and added a retry wrapper for initializing settings to handle connection timeouts gracefully.

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Torsten Schulz (local)
2026-01-26 16:27:36 +01:00
parent 71748f6aa0
commit ca614f6cc2
2 changed files with 36 additions and 6 deletions
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16
backend/utils/sequelize.js
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@@ -38,6 +38,12 @@ if (!dbName || !dbUser || !dbHost) {
throw new Error('Missing required database environment variables: DB_NAME, DB_USER, or DB_HOST');
}
const poolMax = Number.parseInt(process.env.DB_POOL_MAX || '5', 10);
const poolMin = Number.parseInt(process.env.DB_POOL_MIN || '1', 10);
const poolAcquire = Number.parseInt(process.env.DB_POOL_ACQUIRE || '30000', 10);
const poolIdle = Number.parseInt(process.env.DB_POOL_IDLE || '10000', 10);
const poolEvict = Number.parseInt(process.env.DB_POOL_EVICT || '1000', 10);
const sequelize = new Sequelize(dbName, dbUser, dbPass, {
host: dbHost,
dialect: 'postgres',
@@ -48,11 +54,11 @@ const sequelize = new Sequelize(dbName, dbUser, dbPass, {
benchmark: SQL_BENCHMARK,
logging: sqlLogger,
pool: {
max: 5, // Maximale Anzahl von Verbindungen im Pool (reduziert, um Connection Limit zu vermeiden)
min: 1, // Minimale Anzahl von Verbindungen im Pool
acquire: 30000, // Maximale Zeit (ms) zum Erwerb einer Verbindung (30 Sekunden)
idle: 10000, // Maximale Zeit (ms), die eine Verbindung idle sein kann, bevor sie entfernt wird
evict: 1000, // Intervall (ms) zum Prüfen auf idle Verbindungen
max: poolMax, // Maximale Anzahl von Verbindungen im Pool
min: poolMin, // Minimale Anzahl von Verbindungen im Pool
acquire: poolAcquire, // Maximale Zeit (ms) zum Erwerb einer Verbindung
idle: poolIdle, // Maximale Zeit (ms), die eine Verbindung idle sein kann, bevor sie entfernt wird
evict: poolEvict, // Intervall (ms) zum Prüfen auf idle Verbindungen
handleDisconnects: true // Automatisches Reconnect bei Verbindungsverlust
},
dialectOptions: {