StandAloneReadAheadCount - Advanced SQL Engine - Teradata Database

Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Published
July 2021
Language
English (United States)
Last Update
2021-07-27
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B035-1102
lifecycle
previous
Product Category
Teradata Vantageā„¢
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
  • File system utility (for example, Ferret) operations, such as SCANDISK, that occur when Vantage is not running
To enable the read-ahead feature, the ReadAhead field must be set to TRUE.

Field Group

Performance

Valid Range

1 through 100 blocks

Default

20 blocks

Changes Take Effect

After the DBS Control record has been written.

Usage Notes

The number of data blocks to be preloaded during file system utility operations when Vantage is running is determined by the UtilityReadAheadCount setting.