title: How to restrict the whole schema's size?
body: <p>Every user has its own schema. </p>
  
  <p>I want to restrict every schema under specified size. While reading the manual, I found it doesn't seem have such limitation. Is it possible? </p>
  
  <pre><code>drop schema jacob_001 cascade;
  /*drop schema jacob cascade;*/
  create schema jacob_001;
  /*create schema jacob;*/
  
  /*使用缺省的schema*/
  set search_path to jacob_001;
  
  create table messages(
         id    integer,
         message text,
         culture_location varchar(6),
         primary key (id,culture_location)
         );
  
  create table media_types(
         /*code       char(2) primary key,*/
         id           integer primary key,
         description      text
         /*message_code      int*/
         );
  </code></pre>