14.5. Considerations and Limitations #

Postgres Pro AXE has the following limitations that must be considered when executing OLAP operations:

  • pgpro_axe executes SQL commands within a single server and is limited by the server capacity. Typically, the limit of data that pgpro_axe can process in a single SQL command on an average server (256 CPU, 2 TB RAM) does not exceed 100 TB.

    To process a larger data scope, split the initial data into smaller parts. Process each part in a separate analytical query and save the result in a temporary table. After processing all parts, combine the results in a final analytical query.

  • For the massively parallel mode with many servers involved, it is required either to balance SQL commands at the application level or to make use of proxima.

  • The pgpro_axe SQL syntax is compatible with but does not fully match the PostgreSQL syntax. Certain analytical queries operating within Postgres Pro must be modified to be executable in pgpro_axe .