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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.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Disk, memory, and process management
Virtual processors and threadsThese topics describe virtual processors, explain how threads run within the virtual processors, and explain how the database server uses virtual processors and threads to improve performance.
Virtual processor classesEach class of virtual processor is dedicated to processing certain types of threads.
CPU virtual processorsThe CPU virtual processor runs all session threads (the threads that process requests from SQL client applications) and some internal threads.
Processor affinityThe database server supports automatic binding of CPU virtual processors to processors on multiprocessor computers that support processor affinity.

Processor affinity

The database server supports automatic binding of CPU virtual processors to processors on multiprocessor computers that support processor affinity.

Your database server distribution includes a machine notes file that contains information about whether your database server version supports this feature. When you assign a CPU virtual processor to a specific CPU, the virtual processor runs only on that CPU, but other processes also can run on that CPU.

Use the VPCLASS configuration parameter with the aff option to implement processor affinity on multiprocessor computers that support it.

The following figure illustrates the concept of processor affinity.

This figure shows three virtual processors. An arrow from one virtual processor points to CPU 1. An arrow from the next virtual processor points to CPU 2. An arrow from the third virtual processor points to CPU 3. — Figure 1: Processor affinity

UNIX only: To see if processor affinity is supported on your UNIX™ platform, see the machine notes file.

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