pleromer-stuff/repack.md

If your database is unexpectedly large, it may be from old pg_repack remnants, which just sit there taking up space if a repack job is interrupted.

To check if any such tables exist, run this query and look for tables named something like table_54956456 and log_9345345234, basically anything starting with table_ and log_ with a whole bunch of numbers afterwards.

SELECT
   relname as table_name,
   pg_size_pretty(pg_total_relation_size(relid)) As "Total Size",
   pg_size_pretty(pg_indexes_size(relid)) as "Index Size",
   pg_size_pretty(pg_relation_size(relid)) as "Actual Size"
   FROM pg_catalog.pg_statio_user_tables 
ORDER BY pg_total_relation_size(relid) DESC;

If you see shit like log_490586 and table_345345345345 in there, that's repack remnants.

To clean this up, simply drop the repack extension with the CASCADE option and re-add it to the database:

DROP EXTENSION pg_repack CASCADE; CREATE EXTENSION pg_repack;

The disk space will be freed back up immediately, without the need for VACUUM FULL or REPACK.