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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Performance GuideThe HCL OneDB™ Performance Guide describes how to configure and operate your HCL OneDB™ database server to improve overall system throughput and to improve the performance of SQL queries.
Parallel database query (PDQ)You can manage how the database server performs PDQ and you can monitor the resources that the database server uses for PDQ.
Managing PDQ queriesThe database server administrator, the writer of an application, and the users all have a certain amount of control over the amount of resources that OneDB allocates to processing a query. The database server administrator exerts control through the use of configuration parameters. The application developer or the user can exert control through an environment variable or SQL statement.
Setting the PDQ priority dynamicallyYou can use the SET PDQPRIORITY statement to set PDQ priority dynamically within an application. The PDQ priority value can be any integer from -1 through 100.

Setting the PDQ priority dynamically

You can use the SET PDQPRIORITY statement to set PDQ priority dynamically within an application. The PDQ priority value can be any integer from -1 through 100.

The PDQ priority set with the SET PDQPRIORITY statement supersedes the PDQPRIORITY environment variable.

The DEFAULT tag for the SET PDQPRIORITY statement allows an application to revert to the value for PDQ priority as set by the environment variable, if any. For more information about the SET PDQPRIORITY statement, see the HCL OneDB™ Guide to SQL: Syntax.