Master Note: High Undo Space Usage (文档 ID 1578639.1) IF: High Undo Tablespace Space Usage Without any Active Transactions (文档 ID 1951404.1) IF: High Undo Tablespace Space Usage due to Active Transactions (文档 ID 1951403.1) Undo Remains Unexpired When Using Non-autoextensible Datafiles For Th...