Performance Effects of Query Logging - Teradata Database

Teradata Database Administration

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Performance Effects of Query Logging

Because DBQL operates asynchronously, the logging activity has a much lower impact on the overall response time of given transactions. Furthermore, DBQL writes its information to internal memory buffers or caches. These are flushed to disk when the buffer is full or at the time indicated by the DBS Control Record field DBQLFlushRate. The default rate is every 10 minutes for normal operation, but the Database Administrator (DBA) can change the rate to be more frequent to analyze performance issues.

For information on DBQLFlushRate, see Utilities.