# AIO (The Pneumatic Tube) **Asynchronous I/O (AIO)** wait events occur when the elephant is using the modern, high-speed **Pneumatic Tube System** to talk to the Frozen Pantry elevator. Think of it as sending a message in a canister down into the basement and checking back later for the response. ![[assets/arch_aio_system_v2.png|256]] --- ![[Workloads/IO/AIO/AioIoCompletion]] ![[Workloads/IO/AIO/AioIoUringExecution]] ![[Workloads/IO/AIO/AioIoUringSubmit]]