Will Postgres be able to handle traffic?

PostgreSQL can handle high traffic, but its performance depends on workload, hardware, and configuration. For read‑heavy workloads, you can use read replicas, connection pooling (PgBouncer), and proper indexing. For write‑heavy traffic, consider partitioning tables, using write‑ahead logging (WAL) settings like synchronous_commit=off, and tuning checkpoint settings. Scaling horizontally is limited; you can use logical replication or sharding tools such as Citus or Postgres‑XL to distribute writes across nodes. Additionally, using SSDs, increasing memory for shared buffers, and enabling parallel query execution can improve throughput. In practice, a single Postgres instance can comfortably handle tens of thousands of transactions per second with the right tuning, but for millions per second you’ll need sharding or a distributed database that builds on Postgres.