Link: https://github.com/serpent7776/pg_worker_pool/

I'm doing an extension that creates a pool of named background workers. Happy to hear any feedback on this.

CREATE EXTENSION pg_worker_pool;
CALL worker_pool.submit('foo', 'create index myindex_1 on my_big_table (id)');
CALL worker_pool.submit('foo', 'create index myindex_1 on my_big_table (name)');
CALL worker_pool.submit('bar', 'create index otherindex_2 on other_big_table (author)');
CALL worker_pool.submit('bar', 'create index otherindex_2 on other_big_table (title)');

This will start two background workers, foo and bar. foo will create an indices on table my_big_table and bar on table other_big_table. foo and bar will run independently of each other, but all indices submitted to the same worker will be created in order.