CPU virtual processors

The CPU virtual processor runs all session threads (the threads that process requests from SQL client applications) and some internal threads.

Internal threads perform services that are internal to the database server. For example, a thread that listens for connection requests from client applications is an internal thread.

Each CPU virtual processor can have a private memory cache associated with it. Each private memory cache block consists of 1 to 32 memory pages, where each memory page is 4096 bytes. The database server uses the private memory cache to improve access time to memory blocks. Use the VP_MEMORY_CACHE_KB configuration parameter to enable a private memory cache and specify information about the memory cache. For more information, see the HCL Informix® Administrator's Reference and the HCL Informix Performance Guide.

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