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Performance & Capacity Planning for AIX and Power Systems

Technical Details and Requirements.

All of the collection agents are standard tools that are supplied with the operating system or well know freely available tools that can be downloaded from the internet. This helps to reduce on-going maintenance costs to almost nothing.

How to collect the performance data?

pSeries data is collected by the AIX topas command running on one LPAR per pSeries system. AIX data is collected by the NMON command which is now a standard tool in AIX from AIX 5.3 TL 9 onwards.

How to process the performance data?

Standard operating system tools and commands. A set of utilities process the performance data and load it in to a database.

How to graph the performance data?

A set of utilities run as required to generate the graphs. Some of the graphing utilities run as a scheduled job to create the web site thumbnails and icons. The larger, more detailed graphs and reports are generated in real time as required.

What are the disk storage requirements?

The database is of a fixed size, by default, holding 2 years worth of data in a round robin database.

Two years topas CEC performance data 20 Megabytes.
Two years Host performance data 20 Megabytes.
Two years NMON performance data 60-70 Megabytes.
Two years WLM performance data 25 Megabytes per class.