I have a table with 120 million rows of data spread among 512 partitioned by hash table. The id column of the table is a uuid, which is what is being used for the partition hash and it's also the PK for the table. The table has a text column, which also has a btree index on it. A select query on an identical non-partitioned table takes 0.144 seconds, but on the partitioned table it takes 5.689 seconds. Am I missing something in my setup? Or is this expected? I do know having more than 100 partitions in prior versions of PostgreSQL 12 would cause a major slow down, but from what I read PostgreSQL 12 addresses that now? https://www.2ndquadrant.com/en/blog/postgresql-12-partitioning/
