Agrajag-

root@fenua:~# cat /proc/meminfo 
MemTotal:      1807360 kB
MemFree:         15452 kB
Buffers:        105044 kB
Cached:        1534772 kB
SwapCached:          0 kB
Active:         727884 kB
Inactive:       959660 kB
HighTotal:     1203788 kB
HighFree:         4420 kB
LowTotal:       603572 kB
LowFree:         11032 kB
SwapTotal:     5242872 kB
SwapFree:      5242828 kB
Dirty:            1892 kB
Writeback:           0 kB
AnonPages:       47804 kB
Mapped:          21880 kB
Slab:            66784 kB
PageTables:       1628 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   6146552 kB
Committed_AS:   359640 kB
VmallocTotal:   116728 kB
VmallocUsed:      6660 kB
VmallocChunk:   109860 kB
root@fenua:~# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     1765     2 r-----   5822.5
afaitu                                     5      128     1 -b----   1232.2
mahana                                     6      512     1 -b----  24674.1

root@fenua:~# xm mem-set afaitu 256
root@fenua:~# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0     1765     2 r-----   5846.1
afaitu                                     5      256     1 -b----   1235.1
mahana                                     6      512     1 r-----  24743.3