V$CACHE

V$CACHE displays information from the block header of each block in the SGA of the current instance as related to particular database objects. This is a Real Application Clusters view.

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 x to null 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 This column is obsolete and maintained for backward compatibility.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)`	Name of the partition (null for non-partitioned objects)
`KIND`	`VARCHAR2(15)`	Type of the database object: `INDEX` `TABLE` `CLUSTER` `VIEW` `SYNONYM` `SEQUENCE` `PROCEDURE` `FUNCTION` `PACKAGE` `NON-EXISTENT` `PACKAGE BODY` `TRIGGER` `TYPE` `TYPE BODY` `TABLE PARTITION` `INDEX PARTITION` `LOB` `LIBRARY` `JAVA SOURCE` `JAVA CLASS` `JAVA RESOURCE` `JAVA DATA` `UNDO`
`OWNER#`	`NUMBER`	Owner number
`LOCK_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.
`LOCK_ELEMENT_NAME`	`NUMBER`	Name 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.