How to subscribe to pgsql-hack...@postgresql.org

Hi, I'm subscribing to pgsql-hack...@lists.postgresql.org but only see emails with this domain comes to my gmail. I'm having a hard time to find out how to subscribe to pgsql-hack...@postgresql.org. I can't find it in the subscription manage portal https://lists.postgresql.org/manage/ Appreciate

can someone send a design document of "parallel work" to me?

Hi, all, I hava read the code for "parallel work" of PostgreSQL 9.6, I hope someone can give me a design document of "parallel work". Thanks, Lin