Heroku and AWS hate him! Want to reduce your server bills by running more processes per server but running out of RAM? Ever wonder why that poor Ruby application of yours is using hundreds of megabytes of memory anyway? Not sure if your application has a memory leak or just bloat? Don't even know the difference? We'll talk about what causes memory usage, how to debug bloated memory and memory leaks, and how to write faster Ruby programs by decreasing the amount of memory they need.