How well does Tableau perform?
Tableau can be used with data of all shapes and sizes, from the smallest spreadsheets to the largest data warehouses. Some customers use Tableau as a front-end to databases containing hundreds of millions of rows of data. Others use Tableau as a front-end to enormous corporate OLAP cubes. Others just use Tableau with their favorite little text files containing interesting data sets. When dealing with very large databases, Tableau’s performance is largely limited by the performance of the database containing your data. For instance, if your Oracle or SQL Server database is slow, it will likely respond slowly to Tableau’s queries.