As promised today we'll be looking at how to monitor CPU.
Thresholds
When dealing with thresholds there is no one size fits
all but a good rule of thumb is 70% for a warning and 85% for an alarm these
can and should be tweaked when you have a better idea of performance thresholds
for your CPU.
Additionally it is good to have a thresholds in place
for when a CPU is being under-utilized maybe threshold for 20% and 10% this
lets you know which machine could be pushed harder.
Trends
When setting up a trend, you have to remember the
longer the trend the less reliable it is. A good rule of thumb for trend is 3
months, as this gives a reasonably reliable trend and also lets you know within
time to make a hardware change.
Reports
CPU Total Utilization
Estd% - Report Example
Above
is an example of an Estimated CPU core busy over a month for my computer with a
trend going forward 1 month, you can see quickly that the trend line is going
down. This kind of chart is very simple to create with a capacity management
tool like athene®.
On Wednesday I'll be dealing with Memory and how to monitor this. Don't forget to take a look at our workshops, there are some great ones coming up soon
http://www.metron-athene.com/services/online-workshops/index.html
Josh Worth
Consultant
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