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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.
Effect of configuration on CPU utilizationThe combination of operating-system and HCL OneDB™ configuration parameters can affect CPU utilization. You can change the settings of the HCL OneDB™ configuration parameters that directly affect CPU utilization, and you can adjust the settings for different types of workloads.
Configuration parameters and environment variables that affect CPU utilizationSome configuration parameters and environment variables affect CPU utilization. You might need to adjust the settings of these parameters and variables when you consider methods of improving performance.
Specifying virtual processor class informationUse the VPCLASS configuration parameter to specify a class of virtual processors, the number of virtual processors that the database server should start for a specific class, and the maximum number allowed.
Specifying processor affinityUse the aff option of the VPCLASS parameter to specify the processors to which you want to bind CPU VPs or AIO VPs. When you assign a CPU VP to a specific CPU, the VP runs only on that CPU. However, other processes can also run on that CPU.

Specifying processor affinity

Use the aff option of the VPCLASS parameter to specify the processors to which you want to bind CPU VPs or AIO VPs. When you assign a CPU VP to a specific CPU, the VP runs only on that CPU. However, other processes can also run on that CPU.

The database server supports automatic binding of CPU VPs to processors on multiprocessor host computers that support processor affinity. Your database server distribution includes a machine notes file that contains information about whether your version of the database server supports this feature.

You can use processor affinity for the purposes that the following sections describe.