
288 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
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Average:4 57 0.64 0.67
05:00:01 PM DEV tps blks/s
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Average:dev3-0 0.87 96.40
Average:dev8-0 10.01 406.08
8.3.7 isag
The output of sar is straight text and can be very time consuming to process. Instead, the
isag command (Interactive System Activity Grapher) can show the data gathered by sar in a
graphical format (see Figure 8-5).
Figure 8-5 Paging statistics
When you start isag you must first select a data source. Click the - button to the right of data
source. A menu will appear showing the different data sources available. The data sources
are named sa01, sa02, sa03, etc., ...