PostgreSQL is an open-source relational database management system designed to handle a wide range of workloads. It's known for its robustness, scalability, and technical standards compliance. PostgreSQL supports various data types like JSON, XML, and arrays, as well as user-defined types. Its extensibility allows custom functions written in different programming languages like Python, Java, or C/C++. The database has a strong reputation for reliability, data integrity, and correctness. However, it needs tweaks to accommodate the overwhelming amounts of time-series data currently produced by applications. To manage time-series data, one must consider data lifecycle management, which includes ingesting and storing data efficiently, querying recent raw data regularly, creating aggregated historical rollups, archiving older raw data, and dropping raw data after a predefined interval passes. PostgreSQL provides features like hypertables, compression, continuous aggregates, tablespaces, and user-defined actions to support time-series data management. These features enable fast data ingestion, efficient query performance, cost-effective storage, and customizable workflows for managing time-series data.