invalid parameter "/1/params": incorrect usage of function "last"

[Daniel Liang]

Hello All

I have created an item using memory check but I am getting below error :

Name : Used memory check
Type : Calculated
Key : vm.memory.size[used]
Formula : (last("vm.memory.size[total]")-last("vm.memory.size[available]"))
Type of information : Numeric unsigned
Units : B

This item status shows Error :: invalid parameter "/1/params": incorrect usage of function "last"
May I get some help ?

Thanks

[Dempisei]

Hello Daniel.

last(//vm.memory.size[total])-last(//vm.memory.size[available])

That's how it works for me.

At some Zabbix's version, you may use // instead of " .