Specifies the number of data blocks beyond the current block that will be preloaded into memory during the following sequential scan operations:
- File system startup
- Ferret and Filer utility operations, such as SCANDISK, that occur when Teradata Database is not running
To enable the read-ahead feature, the ReadAhead field must be set to TRUE.
1 through 100 blocks
Changes Take Effect
After the DBS Control record has been written.
The number of data blocks to be preloaded during Ferret and Filer operations when Teradata Database is running is determined by the UtilityReadAheadCount setting.