Purpose
Determines the amount of cache (in megabytes) allocated for DBQL Data Dictionary tables that have LOB columns. This field also determines the size of the express message used to flush this cache.
Teradata recommends leaving this field set to the default value.
Field Group
Performance
Valid Range
2 through 16 MB
Default
2 MB
Changes Take Effect
After the next Teradata Database restart.
Usage Notes
Increasing the cache size allows larger requests to be captured by DBQL, and reduces the number of cache flushes. However, it will increase the express request message size when flushing the cache.
Related Topics
| For more information on… | See… |
|---|---|
| BEGIN QUERY LOGGING, END QUERY LOGGING, and FLUSH QUERY LOGGING statements | Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144. |
| tracking processing behavior with the DBQL | Teradata Vantage™ - Database Administration, B035-1093. |