# IO (The Sigh) ![[assets/wl_io.png|256]] When you see an IO wait event, the elephant is in "The Sigh" mode. He is completely still, standing by the elevator, waiting for a **[[Structures/Page|Page]]** to be brought up from the **[[Resources/Disk IO|Frozen Pantry]]**. Every event below represents the elephant waiting for a specific part of the filing cabinet to respond. --- ![[Workloads/IO/DataFile/_DataFile]] --- ![[Workloads/IO/WAL/_WAL]] --- ![[Workloads/IO/AIO/_Aio]] --- ![[Workloads/IO/ControlFile/_ControlFile]] --- ![[Workloads/IO/SLRU/_SLRU]] --- ![[Workloads/IO/Replication/_Replication]] --- ![[Workloads/IO/LockFile/_LockFile]] --- ![[Workloads/IO/RelationMap/_RelationMap]] --- ![[Workloads/IO/LogicalRewrite/_LogicalRewrite]] --- ![[Workloads/IO/ReorderBuffer/_ReorderBuffer]] --- ![[Workloads/IO/BaseBackup/_BaseBackup]] --- ![[Workloads/IO/BufFile/_BufFile]] --- ![[Workloads/IO/MultiXact/_MultiXact]] --- ![[Workloads/IO/Notify/_Notify]] --- ![[Workloads/IO/CopyFile/_CopyFile]] --- ![[Workloads/IO/VersionFile/_VersionFile]] --- ![[Workloads/IO/DSM/_DSM]]