HammerDB

HammerDB is an open-source, transactional and decision support benchmarking tool. It is designed to test the performance of database systems under various workloads. The tool supports a wide range of popular database platforms including Oracle, Microsoft SQL Server, MySQL, PostgreSQL, and MariaDB. HammerDB allows users to create realistic workloads that simulate typical database operations.

The primary focus of HammerDB is on transactional processing, commonly measured by transactions per second (TPS). It offers pre-built benchmarks such as TPC-C and TPC-H, which are industry-standard benchmarks for OLTP and decision support systems respectively. Users can also create custom workloads to test specific application requirements. The tool provides detailed performance metrics, including throughput, latency, and resource utilization, which are crucial for performance tuning and capacity planning.

HammerDB is written in Tcl (Tool Command Language) and can be run from the command line or through a graphical user interface. Its flexibility and support for multiple database systems make it a valuable tool for database administrators, developers, and performance engineers seeking to evaluate and optimize database performance. The project is actively maintained and has a community of users contributing to its development.