| Property | Description |
|---|---|
| Parameter type | Big integer |
| Syntax | DB_CACHE_SIZE = integer [K | M | G] |
| Default value | If SGA_TARGET is set: If the parameter is not specified, then the default is 0 (internally determined by the Oracle Database). If the parameter is specified, then the user-specified value indicates a minimum value for the memory pool.
If |
| Modifiable | ALTER SYSTEM |
| Basic | No |
DB_CACHE_SIZE specifies the size of the DEFAULT buffer pool for buffers with the primary block size (the block size defined by the DB_BLOCK_SIZE initialization parameter).
The value must be at least 4M * number of cpus (smaller values are automatically rounded up to this value). A user-specified value larger than this is rounded up to the nearest granule size. A value of zero is illegal because it is needed for the DEFAULT memory pool of the primary block size, which is the block size for the SYSTEM tablespace.
See Also:
Oracle Database Performance Tuning Guide and Oracle Database Administrator's Guide for more information on setting this parameter