Node.js & Libuv•Part 5: Production Scale, Deployment & Observability (51 - 60)
Managing DB Connection Pools during surges.
In Simple Words:
Set maximum pool size based on PostgreSQL capacity (max_connections = (cores * 2) + disk_spindles). Deploy a proxy pooler (PgBouncer) between Node instances and the database to prevent overwhelming the DB during autoscaling bursts.
javascript
// PostgreSQL pool configuration in Node.js (pg library):
const { Pool } = require('pg');
const pool = new Pool({
host: 'pgbouncer.internal',
port: 6432,
max: 20, // Max clients in this Node instance pool
idleTimeoutMillis: 30000,
connectionTimeoutMillis: 2000
});