Tenho dois servidores com CentOS 5.2 num "Intel(R) Xeon(R) CPU E5420  @ 2.50GHz" com kernel "Linux servidor 2.6.18-92.1.22.el5 #1 SMP Tue Dec 16 12:03:43 EST 2008 i686 i686 i386 GNU/Linux". Porém apesar destes servidores estarem com 4GB de RAM o Linux somente informa o seguinte:

MemTotal:      2577720 kB
MemFree:        125988 kB
Buffers:        365032 kB
Cached:        1737368 kB
SwapCached:          0 kB
Active:         621036 kB
Inactive:      1625764 kB
HighTotal:     1698164 kB
HighFree:         4864 kB
LowTotal:       879556 kB
LowFree:        121124 kB
SwapTotal:    78140080 kB
SwapFree:     78140080 kB
Dirty:            1600 kB
Writeback:           0 kB
AnonPages:      144456 kB
Mapped:          20336 kB
Slab:           154524 kB
PageTables:       2676 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  79428940 kB
Committed_AS:   442228 kB
VmallocTotal:   114680 kB
VmallocUsed:     41480 kB
VmallocChunk:    73104 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     4096 kB

O que estaria limitando o uso efetivo de toda memória física instalada???

Sds,