NUMCPUVPS

onconfig.std value

1

units

Number of CPU VPs

range of values

1 through the number of CPUs

takes effect

When the database server shuts down and restarts

utilities

onmode -p in Add or Remove Virtual Processors

refer to

The following material:

• CPU virtual processors, in the chapter on virtual processors and threads in the IBM Informix Administrator's Guide
• VPCLASS

NUMCPUVPS specifies the number of virtual processors of the CPU class to run. CPU virtual processors run all threads that start as the result of a connection by a client application, as well as internal threads. In general, allocate only one CPU virtual processor on a single-processor computer or node. On a multiprocessor computer or node, do not allocate more CPU virtual processors than there are CPUs.

On UNIX, use the onmode -p -1 CPU command to decrease the number of CPU VPs. On Windows, you can add a CPU VP, but you cannot subtract it.