On Mon, 29 Mar 2010, Dana Hudes wrote:
Orcallator, procallator and friends aren't shiny new toys
Adrian Cockroft wrote initial version of orcallator in the early 90s for his book
"Solaris Performance Tuning. The 2nd edition is I think 1998.
The current version of ORCA (processes the collected data) is from I believe
2007 or so
www.orcaware.org i think it was
I was being facetious. Your immediate dismissal of SAR is ill-advised. I'm
wearing my abestos-lined boxers, so I'll lob this little inflammatory gem
out there: if you're running a server (especially in production) and you're
*not* running SAR, you're a freaking idiot.
Profiling individual programs is all well and good for occasional or
developer use, but the point of SAR is to give you a global view into the
health of your system and to identify architectural bottlenecks. I think it
would be greatly entertaining for Elaine or any of the other mirror
operators to post their SAR reports so you guys can see the huge amount of
abuse being heaped on their servers.
SAR is debatably one of the lowest overhead methods of gaining that
macroscopic view, and it still has profiling value on development systems
when you're testing a specific workload.
To ignore SAR is to show zero competence as a sys-admin.
--Arthur Corliss
Live Free or Die
