Reading from the control file. This happens often. For example, while:
- Making a backup of the control files
- Sharing information (between instances) from the control file
- Reading other blocks from the control files
- Reading the header block
Wait Time: The wait time is the elapsed time of the read
| Parameter | Description |
|---|---|
| file# | The control file from which the session is reading |
| block# | Block number in the control file from where the session starts to read. The block size is the physical block size of the port (usually 512 bytes, some UNIX ports have 1 or 2 Kilobytes). |
| blocks | The number of blocks that the session is trying to read |
Oracle Database Internal Mechanism 