Hi Brad !

Nice meeting you yesterday :-)

I took a closer look at PCP to see what it uses for the meta level
description for every metric.  I thought this might be interesting for 
you.  Here you go:


- Data type:  union of all C types, plus blob
- Semantics: counter, instant, descrete
- Units and scale:  dimension and scale for space, time, count


Here are some examples:


kernel.all.load [1, 5 and 15 minute load average]
Data Type: float InDom: 60.2 0xf000002
Semantics: instant Units: none

kernel.percpu.cpu.user [percpu user CPU time metric from /proc/stat]
Data Type: 64-bit unsigned int InDom: 60.0 0xf000000
Semantics: counter Units: millisec


For detailed info you can check out "man PMAPI" on any SLES box.


Matthias


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