Incident:

Platform unusable on 11/21/2021 between 11:00am - 12:15pm PDT

Timeline:

• Operations team reported platform sluggishness around 11:00 AM PDT
• Problem resolved at 12:15 pm PDT after rolling back the release and killing long running DB queries

RCA:

A new slow query caused database to back up and platform stopped processing new events. Release was reverted back.