DATA_TRANSFER_CACHE

1.70 DATA_TRANSFER_CACHE_SIZE

DATA_TRANSFER_CACHE_SIZE sets the size of the data transfer cache (in bytes) used to receive data blocks (typically from a primary database in an Oracle Data Guard environment) for consumption by an instance during execution of an RMAN RECOVER ... NONLOGGED BLOCK command.

Property	Description
Parameter type	Big integer
Syntax	`DATA_TRANSFER_CACHE_SIZE =` `integer` `[K \| M \| G]`
Default value	If `SGA_TARGET` is set, then if `DATA_TRANSFER_CACHE_SIZE` is not specified, the default size of the data transfer cache is 0 (internally determined by Oracle Database). If `SGA_TARGET` is set and `DATA_TRANSFER_CACHE_SIZE` is specified, then the user-specified value indicates the minimum value for the data transfer cache. If `SGA_TARGET` is not set, the data transfer cache will not be available.
Modifiable	`ALTER SYSTEM`
Modifiable in a PDB	No
Range of values	0 – 512M, rounded up to the next granule size
Basic	No
Oracle RAC	Multiple instances can have different values.

This initialization parameter needs to be set only for databases that do not use Automatic Memory Management and that use the RMAN RECOVER ... NONLOGGED BLOCK command.