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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.
Java™ virtual processorsJava™ UDRs and Java™ applications run on specialized virtual processors, called Java virtual processors (JVPs).

Java virtual processors

Java™ UDRs and Java applications run on specialized virtual processors, called Java virtual processors (JVPs).

A JVP embeds a Java virtual machine (JVM) in its code. A JVP has the same capabilities as a CPU VP in that it can process complete SQL queries.

You can specify as many JVPs as your operating system allows. If you run many Java UDRs or parallel PDQ queries with Java UDRs, you must configure more JVPs. For more information about UDRs written in Java, see HCL® J/Foundation Developer's Guide.

Use the VPCLASS configuration parameter with the jvp keyword to configure JVPs. For more information, see the configuration parameters chapter in the HCL OneDB™ Administrator's Reference.