Yandex, for example, stores petabytes of data in PostgreSQL, which enables the company’s email service to handle more than 150 million emails a day. GitLab, which has been using Postgres for years, maintains a large cluster that handles 181,000 transactions per second. IKEA, which moved to PostgreSQL to reduce its total cost of ownership (TCO), has a number of databases running multiple terabytes of data.
