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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 Informix® database servers.
High-Performance Loader User's GuideThe describes how to use the HCL Informix® to load and unload large quantities of data efficiently to or from Informix® databases.
Manage the High-Performance Loader
HPL performanceYou can improve the HPL performance by preparing an environment that is optimized for the particular load or unload job that you are performing.
HPL performance hintsIn general, the performance of the depends on the underlying hardware resources: CPU, memory, disks, tapes, controllers, and so on. Any of these resources could be a bottleneck, depending on the speed of the resource, the load on the resource, and the particular nature of the load or unload.
Ensure enough memoryTo maximize available memory and scan resources, the automatically sets the PDQPRIORITY environment variable to 100, if it is not already set. If the PDQPRIORITY environment variable is set, HPL uses that value.

Ensure enough memory

To maximize available memory and scan resources, the automatically sets the PDQPRIORITY environment variable to 100, if it is not already set. If the PDQPRIORITY environment variable is set, HPL uses that value.

If the PDQPRIORITY environment variable is set to 0 or if the PDQPRIORITY environment variable is disabled on the database server, then HPL cannot unload multiple devices.

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