Brendan Gregg wrote: > No. Stop. Do not assume any data is better than no data. Wrong > or misleading data is *worse* than no data.
I agree most emphatically. Most metrics recorded by programs are those needed by the authors of the programs. All too few are the ones we need to *use* the program. Solaris is good at collecting, for example, queue occupancy and depth instead of just depth, but we can do more. And the fishwork guys are the ones are doing it, for storage. I therefor suggest we *do* do more, Brendan's alternative B: > 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. --dave (an evil contractor and capacity planner in Toronto) c-b -- David Collier-Brown | Always do right. This will gratify Sun Microsystems, Toronto | some people and astonish the rest dav...@sun.com | -- Mark Twain cell: (647) 833-9377, bridge: (877) 385-4099 code: 506 9191# _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
