Parallel processing

When a client initiates index building, sorting, or logical recovery, the database server creates multiple threads to work on the task in parallel, using as much of the computer resources as possible. While one thread is waiting for I/O, another can be working.

In the following cases, virtual processors of the CPU class can run multiple session threads, working in parallel, for a single client:

For more information about parallel UDR execution, see HCL Informix® User-Defined Routines and Data Types Developer's Guide.

The following figure illustrates parallel processing.
Figure 1. Parallel processing
The paragraph that precedes this figure describes the content of the figure.

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