Nagios Support Forum

Hi,

can i know cause of unreachable & unknown events.

also in reports i found that Memory Usage 0% 100% 0% 0

warning is 100 % so how it is calculation done.

Reachability is determined by the parent-child relationships. If you have a direct connection to a host and you can't ping it, nagios will assume the host is down. However, if nagios cannot ping another host that is a child of the first one (indirect relationship), nagios would not know if the host is truly down and will consider it to be "unreachable" (or "unknown" for services).
On the memory issue - can you post a screenshot of what is shown for Memory Usage?

thanks for clarification.

regards to reports how can i customize reports in different graph format attching screenshot....i would like to have similar one.
if you can help would highly appericiate.

To make custom graphs yo would have to create and add your own custom component.

Documentation on creating custom components can be found here
http://library.nagios.com/library/produ ... evelopment

mean to say other than default we dont have choice if we dont have hands on php.

Correct, although you can also submit a feature request at http://tracker.nagios.com. We also have a metrics component that allows you to compare similar metrics across several hosts, a hostgroup, or servicegroup.
http://exchange.nagios.org/directory/Ad ... nt/details

how to major Memory & CPU

Are there any sub level parameters set within this group,

e.g. How do we get which process is using up the % of memory, similarly for CPU