A cache stampede (ko dogpile) yana faruwa lokacin da maɓuɓɓugar cache key ya ɗan karewa kuma kimantse bukatun daidaita da yawa sun rasa shi a lokaci gida, dukansu suna faɗowa zuwa asali don sake ƙididdige aji gida a lokaci gida. Asali (DB ko hidima) ana bugi ta allurar da ba za ta iya sarrafa ba, wani lokaci na kawo da tsarin.
Dalilin
t=0 hot key expires
t=0+ 1000 requests arrive → all miss → all query the DB for the SAME value
→ DB overwhelmed; latency spikes; failures cascade
