"James Pang (chaolpan)" <chaolpan@xxxxxxxxx> writes: > We have a large database that just migrated data from Oracle to Postgres(13.4), after data load. We try to create indexes , with only one connection , the create index automatically run in parallel (table size 40G) , then we started two connections and each session creating index on large table, but at this time, only 1 session parallel creating index, the other one creating index in serial. There are enough parallel_workers and memory. Is that expected ? only 1 session allowed to parallel index creating at the same time ? Check your settings for max_parallel_workers and max_parallel_maintenance_workers. regards, tom lane
