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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.
Database server operations that use PDQHCL OneDB™ processes some types of SQL operations that the database server processes in parallel. However some situations limit the degree of parallelism that HCL OneDB™ can use.
Parallel index buildsIndex builds can take advantage of PDQ and can be parallelized. The database server performs both scans and sorts in parallel for index builds.

Parallel index builds

Index builds can take advantage of PDQ and can be parallelized. The database server performs both scans and sorts in parallel for index builds.

The following operations initiate index builds:

Create an index.
Add a unique, primary key.
Add a referential constraint.
Enable a referential constraint.

When PDQ is in effect, the scans for index builds are controlled by the PDQ configuration parameters described in The allocation of resources for parallel database queries.

If you have a computer with multiple CPUs, the database server uses two sort threads to sort the index keys. The database server uses two sort threads during index builds without the user setting the PSORT_NPROCS environment variable.