echo 1 > /proc/sys/vm/drop_caches
清理前
# free -h
total used free shared buffers cached
Mem: 19G 19G 203M 1.1G 82M 17G
-/+ buffers/cache: 1.5G 18G
Swap: 23G 159M 23G
清理后
# echo 1 > /proc/sys/vm/drop_caches
# free -h
total used free shared buffers cached
Mem: 19G 2.4G 17G 1.1G 680K 1.4G
-/+ buffers/cache: 1.1G 18G
Swap: 23G 163M 23G
查看内存条数命令：
dmidecode | grep -A16 “Memory Device$”
查看服务器内存槽数量及各内存条大小
linux
dmidecode | grep -A16 “Memory Device$”
esxi
vclient-主机-硬件状态