Special Considerations

Verifying PPU Utilization InformationVerifying PPU Utilization Information

Your PPU system/partition’s processor utilization information is available from the HP PPU web portal. See “PPU Web Portal” on page 36 for details of the PPU web portal.

If you are interested in verifying PPU utilization information against the PPU web portal information, you can use the sar command to compare processor utilization numbers. The sar command is a HP-UX system activity reporter that samples and accumulates processor utilization. See the manpage sar (1M ) for details on the sar command.

An overview of the processor utilization verification process is:

•Create processor utilization numbers for your PPU system/partition with the sar command

•Go to the PPU web portal and capture processor utilization numbers for the same PPU system/partition and duration of time

•Verify the sar utilization numbers against the PPU web portal utilization numbers

 

 

 

To perform the utilization verification process, perform the following

 

 

 

steps:

 

 

 

 

NOTE

 

 

Because the PPU web-portal’s utilization reports contain 30 minutes of

 

 

 

information, beginning on the hour or on the half-hour, it is

 

 

 

recommended to time the execution of Step 1 (below) immediately upon

 

 

 

the start of a hour, or half past the hour. Another option is to create a

 

 

 

shell script that contains the command in Step 1 and schedule a cron job

 

 

 

so it starts exactly on the hour or half hour.

 

 

 

Step

1. In a terminal window on the PPU system, execute the following

 

 

 

command:

 

 

 

/usr/bin/nice --10 /usr/sbin/sar -o /tmp/sarOut 300 12

 

 

 

Where “300” represents the (averaged) interval duration of the

 

 

 

utilization sample, in seconds, and “12” represents the number of

Appendix B

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