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тАО03-20-2002 11:10 AM
тАО03-20-2002 11:10 AM
Mott Given, mgiven@dsdc.dla.mil
Solved! Go to Solution.
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тАО03-20-2002 11:16 AM
тАО03-20-2002 11:16 AM
Re: Counting physical I/O for processes?
If BMC was simply guessing then I doubt if it would have sold such a large number of copies.
The predictive side is based on stats generated over a period of time.
John.
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тАО03-20-2002 12:33 PM
тАО03-20-2002 12:33 PM
SolutionAnd of course theres the measureware agent which collects and logs these stats over time. If you're running this the extract command can be used to export the data into text format so it can be viewed.
Regards,
Steve
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тАО03-21-2002 06:36 AM
тАО03-21-2002 06:36 AM
Re: Counting physical I/O for processes?
1) for a given disk device, each workload has exactly the same # of I/O's to that device
per transaction
2) for each workload they are assuming 50% reads and 50% writes, and are assuming that all I/O's are synchronous. It seems that if they knew the
I/O's to each disk for a process that they would not have to guess about what %'s
are reads, writes, and asynch or synchronous.
3) They use their own data collector and are not getting
data from Measureware.
4) On a per process basis they seem to be measuring blocks in and out instead of I/O's.
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тАО08-15-2002 07:47 AM
тАО08-15-2002 07:47 AM
Re: Counting physical I/O for processes?
As steve mentioned.....it can utilize the hp-ux standard performance commands.......instead of measureware ......you can check by your own samplings
of sar,vmstat,iostat,pstat,netstat -an (for with bmc stats....it shouldnt have guess....
keep monitoring with unix commands and compare with bmc....