Hypothesis: Threads with a high rate of new comments cause Cassandra performance issues by constantly mutating their permacache entry and increasing the amount compactions required. The majority of the problem is the velocity of the updates, not the size of the updates.
Greetings!
This is the primary codebase that powers reddit.com.
For notices about major changes and general discussion of reddit development, subscribe to the /r/redditdev and /r/changelog subreddits.
You can also chat with us via IRC in #reddit-dev on freenode.
Quickstart
To set up your own instance of reddit to develop with, we have a handy install script for Ubuntu that will automatically install and configure most of the stack.
Alternatively, refer to our Install Guide for instructions on setting up reddit from scratch. Many frequently asked questions regarding local reddit installs are covered in our FAQ.
APIs
To learn more about reddit's API, check out our automated API documentation and the API wiki page. Please use a unique User-Agent string and take care to abide by our API rules.
Happy hacking!
Issues and Contribution Guidelines
Thanks for wanting to help make reddit better! First things first, though: github issues is only for confirmed, active bugs. Please submit ideas to /r/ideasfortheadmins.
Please read more on contributions in CONTRIBUTING.md.