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

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