thanks Kir for ur help
now i'm type " cat /proc/meminfo "
MemTotal: 4139044 kB
MemFree: 327076 kB
Buffers: 237680 kB
Cached: 3078872 kB
SwapCached: 8 kB
Active: 1795844 kB
Inactive: 1712808 kB
HighTotal: 786432 kB
HighFree: 208000 kB
LowTotal: 3352612 kB
LowFree: 119076 kB
SwapTotal: 15727624 kB
SwapFree: 15727616 kB
Dirty: 4 kB
Writeback: 0 kB
Mapped: 189456 kB
Slab: 256260 kB
CommitLimit: 17797144 kB
Committed_AS: 539148 kB
PageTables: 3864 kB
VmallocTotal: 303096 kB
VmallocUsed: 27776 kB
VmallocChunk: 274888 kB
this resulte i want swap drive mount in all vps
i hope u understand me