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When JON reports free and used memory on a Linux platform resource it does not take into account cached and buffered memory

Solution Unverified - Updated 2012-04-24T22:49:15+00:00 -

Issue

Monitor Linux memory correctly and usefully
JBoss Operations Network (JBoss ON or JON) shows free memory amount just by looking at the free amount of memory
Free memory reported for Linux is useless because it sums also disk cache and buffers which are filled as much there is free memory available.
Free and used system memory is reported by itself without including memory buffers and cache
The free and used memory reported for the platform does not reflect the actual free and used memory

Environment

JBoss Operations Network (JON) 3.0, 3.0.1
Red Hat Enterprise Linux (RHEL) 5, 6
Platform's Free Memory metric
Platform's Used Memory metric

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