Re: Re: [HACKERS] GSoC 2015 proposal: Improve the performance of “ALTER TABLE .. SET LOGGED / UNLOGGED” statement

On 2015-07-08 10:58:51 -0300, Fabrízio de Royes Mello wrote:
> Think in an ETL job that can be use an unlogged table to improve the load
> performance, but this job create a "large table" and to guarantee the data
> consistency you need to transform it into a regular table, and with the
> current implementation rewrite the entire heap, toast and indexes.

Don't buy that. The final target relation will usually already have
content. Also everything but wal_level=minimal will force you to WAL log
the contents anyway.