Flush Memory
[root@vx111a
~]# free -m
total used free shared buffers cached
Mem: 3031 1811 1220 0 201 1266
-/+
buffers/cache: 343 2688
Swap: 4996 0 4996
[root@vx111a
~]# sync; echo 3>/proc/sys/vm/drop_caches
[root@vx111a
~]# free -m
total used free shared buffers cached
Mem: 3031 1821 1210 0 201
1266
-/+
buffers/cache: 353 2678
Swap: 4996 0 4996
sync
Forces
an immediate write of all updated data from buffers to hard drive
(synchronize drive with buffers). While not strictly necessary, a
sync assures the Sys admin or user that the data just changed will
survive a sudden power failure.
