Performance Tuning

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This is one of the things you might look at while trouble shooting Degradation, but in fact ought to check periodically, to avoid a problem developing and not being spotted. Doubtless someone may update this article to reflect improvements in IBM eServers in later models. The reality of what is needed will vary greatly by what you have on your 400 hardware, in terms of system load, and which version of OS/400 or i5/OS. Al Mac has similar notes at work in FIXTUNING, an SEU "document."

Brain Overload

This is a collection of complicated topics that can take a while to wrap our mind around and thoroughly "Grok", so pick one area, study it, leave the others alone, until ready to move on to something else.

Choices

Errors Clues

Communications Lines

Application Software Review

Batch Considerations

Blocking

Call Frequency

Logicals

Access Path Sharing

Backup Management

System Values

Allocations

Active Jobs

Automatic System Tuning

Cache vs. Bottlenecks

Task Scheduling

Other Resources

Books and Manuals