this was many years ago, as a junior dev .. management was stressing out over how to make our app faster -- long query runtimes. Naively, i pitched that we shou

this was many years ago, as a junior dev .. management was stressing out over how to make our app faster -- long query runtimes. Naively, i pitched that we should run the queries in advance so they would be cached. simple enough. we did some dry runs. it looked good to go. we pushed to prod. its sunday night and i'm asleep, the query runner activates .. and our app proceeds to DDOS our data layer. Not only taking down our prod, but the prod of every app subscribed to the data store. I wasn't oncall, and the oncall didnt have access to the query runner script -- it was on my laptop. So, oncall was desperately trying to fight a fire they couldn't put out while i slept like a baby .. that was a fun monday morning meeting.