Hi Mario,

Seat_vg-seat  or /storage/seat is the one of the database partition which is used to store task and events of vCenter.

You can clear the space of /storage/seat partition by  truncating large table from below commands.

VCDB=# truncate table vpx_event cascade;

VCDB=# truncate table vpx_event_arg cascade;

truncate table vpx_task;

Running above command does not require downtime on vCenter.

For more information please refer below link.

VMware Knowledge Base

Regards,

Sachin