We are having a requirement to create approx 50 billion rows in a partition table(~1 billion rows per partition, 200+gb size daily partitions) for a performance test. We are currently using ' insert into <target table_partition> select.. From <source_table_partition> or <some transformed query>;' method . We have dropped all indexes and constraints First and then doing the load. Still it's taking 2-3 hours to populate one partition. Is there a faster way to achieve this?
Few teammate suggesting to use copy command and use file load instead, which will be faster. So I wanted to understand, how different things it does behind the scenes as compared to insert as select command? As because it only deals with sql engine only.
Additionally, when we were trying to create indexes post data load on one partition, it took 30+ minutes. Any possible way to make it faster?
Is there any way to drive the above things in parallel by utilizing full database resources?
