http://dacxzjk3kq5mmepbdd3ai2ifynlzxsnpl2cnkfhridqfywihrfftapid.onion/help/update/background_migrations.md
Use the following database queries to see the state of the current batched background migration:
Obtain the ID of the running migration:
SELECT
id ,
job_class_name ,
table_name ,
column_name ,
job_arguments
FROM batched_background_migrations
WHERE status NOT IN ( 3 , 6 );
Run this query, replacing XX with the ID you obtained in the previous step,
to see the status of the migration:
SELECT
started_at ,
finished_at ,
finished_at - started_at AS...