pgbench
pgbench is a benchmarking tool included with PostgreSQL that simulates a workload of database transactions to measure performance metrics like transactions per second (TPS) and latency. It runs a series of SQL commands, typically based on a simple TPC-B-like model, to test database throughput and scalability under various configurations. It is commonly used to evaluate hardware, tune PostgreSQL settings, and compare performance across different versions or setups.
Developers should use pgbench when they need to benchmark PostgreSQL database performance, such as during capacity planning, after hardware upgrades, or when optimizing configuration parameters like shared_buffers or work_mem. It is essential for database administrators and developers working on high-performance applications to identify bottlenecks, validate tuning changes, and ensure the database can handle expected loads in production environments.