关于zabbix:zabbix-document

document

https://www.zabbix.com/documentation/3.4/manual/appendix/items/vm.memory.size_params

内置变量
https://www.zabbix.com/documentation/3.4/manual/appendix/macros/supported_by_location

内存

Platform                    available                     used
Linux<3.14      free + buffers + cached     total - free 



zabbix_get -s 10.0.3.101 -k vm.memory.size[available]
zabbix_get -s 10.0.3.101 -k vm.memory.size[free]