Hi, psql (PostgreSQL) 10.3
Here are the steps to reproduce a leak: 1. connect to 10.3 server, perform the query similar to: select 'message' || generate_series(1,1000000000); 2. monitoring psql memory usage in htop or similar tool, press ctrl+c at some point where you can clearly distinguish a psql with a big allocated buffer from psql without it. 3. see the query cancelled, but psql memory usage stays the same. This is especially painful when query you're debugging has a runaway join condition, and you understand it only after it doesn't return in seconds as you've expected. Is it expected behavior (so I can have a look at something server returned somehow and it's kept there for me), or a plain leak? Darafei Praliaskouski, GIS Engineer / Juno Minsk
