I'm trying some experimental tiers on Patreon to see if I can get to substack-like levels of financial support for this blog without moving to substack ! A decade of major cache incidents at Twitter This was co-authored with Yao Yue This is a collection of information on severe ( SEV-0 or SEV-1 , the most severe incident classifications) incidents at Twitter that were at least partially attributed to cache from the time Twitter started using its current incident tracking JIRA (2012) to date (2022), with one bonus incident from before 2012. Not including the bonus incident, there were 6 SEV-0 s and 6 SEV-1 s that were at least partially attributed to cache in the incident tracker, along with 38 less severe incidents that aren't discussed in this post. There are a couple reasons we want to write this down. First, historical knowledge about what happens at tech companies is lost at a...