4 hours ago, by Stack Exchange
posted on July 20, 2016
Overview On July 20, 2016 we experienced a 34 minute outage starting at 14:44 UTC. It took 10 minutes to identify the cause, 14 minutes to write the code to fix it, and 10 minutes to roll out the fix to a point where Stack Overflow became available again. The direct cause was a malformed post that caused one of our regular expressions to consume high CPU on our web servers. The post was in …