User activity types are now set to transient by default for new Evergreen installs. This means only the most recent activity entry per user per activity type is retained in the database.

This change does not affect existing activity types, which were set to non-transient by default. To make an activity type transient, modify the Transient field of the desired type in the staff client under Admin → Server Administration → User Activity Types.

Setting an activity type to transient means data for a given user will be cleaned up automatically if and when the user performs the activity in question. However, administrators can also force an activity cleanup via SQL. This is useful for ensuring that all old activity data is deleted and for controlling when the cleanup occurs, which may be useful on very large actor.usr_activity tables.

To force clean all activity types:

SELECT actor.purge_usr_activity_by_type(etype.id)
    FROM config.usr_activity_type etype;