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Oracle® Database Reference 10g Release 2 (10.2) Part Number B14237-02 |
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# V$CACHE_TRANSFER

This is a Real Application Clusters view. The `V$CACHE_TRANSFER` view is identical to the `V$CACHE` view but only displays blocks that have been pinged at least once. This view contains information from the block header of each block in the SGA of the current instance as related to particular database objects.

Column | Datatype | Description
--- | --- | ---
`FILE#` | `NUMBER` | Datafile identifier number (to find the filename, query `DBA_DATA_FILES` or `V$DBFILE`)
`BLOCK#` | `NUMBER` | Block number
`CLASS#` | `NUMBER` | Class number
`STATUS` | `VARCHAR2(6)` | Status of the block: `free` - Not currently in use `xcur` - Exclusive `scur` - Shared current `cr` - Consistent read `read` - Being read from disk `mrec` - In media recovery mode `irec` - In instance recovery mode
`XNC` | `NUMBER` | Number of PCM lock conversions due to contention with another instance. This column is obsolete and maintained for backward compatibility.
`FORCED_READS` | `NUMBER` | Number of times the block had to be reread from the cache because another instance has forced it out of this instance's cache by requesting the lock on the block in exclusive mode
`FORCED_WRITES` | `NUMBER` | Number of times GCS had to write this block to cache because this instance had used the block and another instance had requested the lock on the block in a conflicting mode
`NAME` | `VARCHAR2(30)` | Name of the database object containing the block
`PARTITION_NAME` | `VARCHAR2(30)` | NULL for non-partitioned objects
`KIND` | `VARCHAR2(15)` | Type of database object See Also: Table 6-1
`OWNER#` | `NUMBER` | Owner number
`GC_ELEMENT_ADDR` | `RAW(4 | 8)` | Address of the lock element that contains the PCM lock that is covering the buffer. If more than one buffer has the same address, then these buffers are covered by the same PCM lock.
`GC_ELEMENT_NAME` | `NUMBER` | The name of the lock that contains the PCM lock that is covering the buffer

See Also: The Oracle Database Oracle Clusterware and Oracle Real Application Clusters Installation Guide for your operating system.