[brlug-general] mosix clusters?

[-ray]

On Mon, 15 Jan 2007, Dustin Puryear wrote:

> You should, at a minimum, have sysstat (the Linux sar package)
> installed on all of your servers and monitor that. Also, do some
> remote SNMP performance monitoring to start seeing where your
> bottlenecks are. Keep in mind that IO issues may appear as CPU issues
> at times.

Good point.  And also memory issues may appear as I/O issues (swapping). 
The right order to track down bottlenecks is: Network->Memory->I/O->CPU.
Read the vmstat and iostat man pages, and actually learn what those 
columns mean. :)

What are you guys using for SNMP performance monitoring?  We have some 
homegrown scripts that generate some RRD graphs.  The pretty graphs are 
really good for trend analysis (and the boss likes them haha).

> Oh, and finally, do realize that there is a difference between local
> performance counters and end-to-end performance testing. An important

"Hmmmm...It's really fast from my computer....not sure why it's so 
slow on your end..."

ray
-- 
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Ray DeJean  				       	 http://www.r-a-y.org
Systems Engineer                    Southeastern Louisiana University
IBM Certified Specialist  	      AIX Administration, AIX Support
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