Dynamic Performance (V$) Views, 30 of 238

V$CLASS_CACHE_TRANSFER

V$CLASS_CACHE_TRANSFER displays the number of blocks pinged per block class. Use this view to compare contentions for blocks in different classes.

Column	Datatype	Description
`CLASS`	`VARCHAR2(18)`	The block class
`X_2_NULL`	`NUMBER`	Number of lock conversions from Exclusive-to-NULL for all blocks of the specified `CLASS`
`X_2_NULL_FORCED_WRITE`	`NUMBER`	Number of forced writes that occur for blocks of the specified `CLASS` due to Exclusive-to-NULL conversions
`X_2_NULL_FORCED_STALE`	`NUMBER`	Number of times a block in the `CLASS` was made `STALE` due to Exclusive-to-NULL conversions
`X_2_S`	`NUMBER`	Number of lock conversions from Exclusive-to-Shared for all blocks of the specified `CLASS`
`X_2_S_FORCED_WRITE`	`NUMBER`	Number of forced writes that occur for blocks of the specified `CLASS` due to Exclusive-to-Shared conversions
`S_2_NULL`	`NUMBER`	Number of lock conversions from Shared-to-NULL for all blocks of the specified `CLASS`
`S_2_NULL_FORCED_STALE`	`NUMBER`	Number of times a block in the `CLASS` was made `STALE` due to Shared-to-NULL conversions
`NULL_2_X`	`NUMBER`	Number of lock conversions from NULL-to-Exclusive for all blocks of the specified `CLASS`
`S_2_X`	`NUMBER`	Number of lock conversions from Shared-to-Exclusive for all blocks of the specified `CLASS`
`NULL_2_S`	`NUMBER`	Number of lock conversions from NULL-to-Shared for all blocks of the specified `CLASS`