On Fri, Feb 13, 2009 at 12:26 AM, Brendan Gregg - Sun Microsystems <bren...@sun.com> wrote: > > No. Stop. Do not assume any data is better than no data. Wrong or > misleading > data is *worse* than no data.
Well, that's not *entirely* true. Senior management isn't satisfied with no data, and prefer simplistic data that they're familiar with - even if we know that it's wrong or misleading. But if we have existing tools that are giving wrong or misleading data, then that's a bunch of bugs that need fixing. > I'm proposing either: > > A) 'perftoolsmib' - export vmstat, iostat, mpstat, etc. > > B) 'perfmib' - make an effort to export useful performance metrics, to meet > stated needs. Examine what's there and keep what is good (I think > "iostat -xne" output is great), drop what's bad (some of vmstat), and add > what is missing - which means adding kstats to the kernel. Isn't that what the project says: "exposes well known Solaris performance metrics via SNMP". It's deliberately open. The mention of mpstat and whatever is just an example - I would actually want the raw numbers underneath all those tools to analyze in more depth. -- -Peter Tribble http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/ _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
