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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.
How virtual processors service threadsA virtual processor services multiple threads concurrently by switching between them.
QueuesThe database server uses three types of queues to schedule the processing of multiple, concurrently running threads.
Ready queuesReady queues hold threads that are ready to run when the current (running) thread yields.

Ready queues

Ready queues hold threads that are ready to run when the current (running) thread yields.

When a thread yields, the virtual processor picks the next thread with the appropriate priority from the ready queue. Within the queue, the virtual processor processes threads that have the same priority on a first-in-first-out (FIFO) basis.

On a multiprocessor computer, if you notice that threads are accumulating in the ready queue for a class of virtual processors (indicating that work is accumulating faster than the virtual processor can process it), you can start additional virtual processors of that class to distribute the processing load. For information about how to monitor the ready queues, see Monitor virtual processors. For information about how to add virtual processors while the database server is in online mode, see Add virtual processors in online mode.