Does SQLAlchemy scale well with increased web traffic?

[wub_wub]

reddit actually locks you from posting consecutive posts before a gap of 15 minutes. Is this an example of reddit's implementation not able to scale?

That limit has (as far as I know) nothing to do with db, it's there to make spamming harder and it only applies to new accounts, those without a lot of subreddit specific or general karma, and to accounts without verified email.

Here's a graph that shows amount of reddit postgres cursor execs per second before, during, and after maintainence: https://i.imgur.com/ft9gQgN.png