title: Why is my PostgreSQL table larger (in GB) than the csv it came from?
body: <p>A &lt; 4 GB csv became a 7.7 GB table in my AWS Postgres instance. And a 14 GB csv wouldn't load into 22 GB of space, I'm guessing because it is also going to double in size! Is this factor of two normal? And if so, why, and is it reliable?</p>