Tantor BE is a Russian-made DBMS based on the updated and improved version of the PostgreSQL DBMS. Tantor BE 16.8.0 is based on PostgreSQL 16.

Below are the additional modules and utilities added to Tantor BE, as well as a list of changes to the server core.

Added the pg_stat_kcache extension. It gathers statistics about real reads and writes done by the filesystem layer.

pg_store_plans:

When upgrading within the current major version and edition, install Tantor BE 16.8.0 and restart the database server with command:

systemctl restart tantor-be-server-16

To migrate from PostgreSQL or Tantor DB, first install the latest minor version and then perform a data dump/restore using pg_dumpall, or use the pg_upgrade utility.

Additionally, to migrate from a PostgreSQL database with the Citus Columnar extension to a PostgreSQL database with the Hydra Columnar extension, you can use the columnar_migrator script, which ensures data integrity and compatibility.

Tantor DB version 16 uses new naming conventions for SLRU cache size parameters. To migrate from version 15 to version 16 with respect to SLRU cache size parameters, use the script upgrade-SLRU-from-TT_15-to-TT_16-version.sh. The script is installed in /opt/tantor/db/16/tools/slru_upgrader/. For script usage, please define the PGDATA variable, which should specify the path to the cluster data directory of the migration target version (16). Help information is also available with the command /opt/tantor/db/16/tools/slru_upgrader/upgrade-SLRU-from-TT_15-to-TT_16-version.sh --help. The following table summarizes the changes in parameter names from Tantor DB 15 to Tantor DB 16: