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free -m is showing total of 309 Mb for a system with 4GB RAM

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linux-howto

http://serverfault.com – OS:Xen Cloud Platform 1.1 (XCP) modified centos, and xen server 5.0 running on intel i5 free -m total used free shared buffers cached Mem: 309 136 172 0 1 17 -/+ buffers/cache: 117 191 Swap: 511 7 504 df -h none 380M 0 380M 0% /dev/shm cat /proc/meminfo MemTotal: 316416 kB MemFree: 79024 kB Buffers: 5444 kB Cached: 79304 kB SwapCached: 0 kB Activ (HowTos)