![[assets/wl_io_buffermapping.png|256]] - **Description**: Occurs when a process is waiting to associate a data block with a buffer within the shared buffer pool. This often involves contention for lightweight locks that protect the buffer cache's hash table entries. - **Operations**: - [[Operations/IndexScan]] - [[Operations/SeqScan]] - [[Operations/BitmapIndexScan]] - [[Operations/NestedLoop]] - [[Operations/IndexOnlyScan]] - [[Operations/ModifyTable]] - **Resources**: [[Resources/Memory|Memory]], [[Resources/CPU|CPU]]