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Practical UNIX by Steve Moritsugu - DTR Business Systems

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Accessing Free (Nonsupported) Software

All vendors provide some internally developed software for monitoring your system free of charge. These are free because they are not supported officially. If you want to report a problem with these tools, you must take it up with the original author, who may or may not be able to do anything, depending on current workload.

An example of such a tool for Sun is SymbEL, originally known as Virtual Adrian, available from http://www.sun.com/sun-on-net/_performance/se3/. This tool enables you to analyze the inner workings of the operating system kernel and reports modifications you could make to get better performance out of it. You will notice that it is explicitly stated that the package is not officially supported ...

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