Postgres Pro Enterprise 9.6支持tablespace 压缩

https://postgrespro.com/docs/enterprise/9.6/cfs-usage

31.3. Using Compression/Encryption

Compression can be enabled for particular tablespaces. System relations are not compressed in any case. It is not currently possible to alter tablespace compression option, i.e. it is not possible to compress existing tablespace or vice versa - decompress compressed tablespace.

So to use compression/encryption you need to create a tablespace with compression=true option. You can make this tablespace your default tablespace - in this case all tables within the current session will be implicitly created in this tablespace:

    postgres=# create tablespace zfs location '/var/data/cfs' with (compression=true);
    postgres=# set default_tablespace=zfs;
  

有关的压缩参数如下：
https://postgrespro.com/docs/enterprise/9.6/runtime-config-cfs