Performance Considerations

The performance of HP servers and applications with the HP-UX 11i Operating Environments is as good or better as compared to HP-UX 11.0 installed in the same configuration. It must be kept in mind, however, that in the vast majority of cases, HP-UX is likely to be installed as part of one of the predefined HP-UX 11i Operating Environments.

The HP-UX 11i Operating Environments provide numerous benefits, including lower cost as well as simplification of product ordering, installation, integration, and support. While the HP-UX 11i Operating Environments provide these desirable benefits, they all involve more software components and daemons than a base HP-UX 11.0 or HP-UX 11i operating system. Because of this, an Operating Environment may have somewhat greater system overhead compared to a base operating system installation. This increase in system overhead, while modest, can nevertheless make it erroneously appear that system and application performance are degraded with HP-UX 11i as compared to HP-UX 11.0. In fact, performance with HP-UX 11i is generally better than HP-UX 11.0 when the software configurations are the same.

While not recommended, one of the options for installing HP-UX 11i is as a base operating system only, without an Operating Environment. Installing HP-UX 11i as a base operating system will give the greatest performance and the lowest system overhead but eliminates the advantages provided by the HP-UX 11i Operating Environments.