I created a clone of the built in trigger "Lack of free swap space on

{HOST.NAME}

"

I then tried to alter the expression to read.

{Template OS Linux:system.swap.size[,pused].last(0)}

<50

Which gives the error
Incorrect item key "system.swap.size[,pused]" provided for trigger expression on "Template OS Linux".

I get the same error when I use "used". Only "pfree" and "total" work.

Tried on Zabbix-server v 2.0.10 and on v2.2.1

According to the "system.swap.size[<device>,<type>]" documentation located at the following link it is supposed to work.
https://www.zabbix.com/documentation/2.2/manual/config/items/itemtypes/zabbix_agent