system.swap.size[,used] does not works. Not supported?

[bogdar]

Hello.

I'd like to monitor swap usage for performance investigation on multiple hosts.

For some reasons, system.swap.size[,used] returns [m|ZBX_NOTSUPPORTED]

There are free, pfree, pused options that works, but they are useless for performance monitoring, because depend on swap space. For example:
Let there are two same hosts with 512Mb and 4096Mb swap space with 20% swap utilisation. This mean ~100Mb for first, and 1Gb (!!!) for second. Sure, 100Mb of swaped memory mostly safe for modern systems, while 1Gb is reason for attention.
So for now, I have to calculate in mind system.swap.size[,total] * system.swap.size[,pused] to get real usage stats, and I can't setup alerts for group of hosts like 'warn admins if hosts with IDE drives use >100 Mb of swap.'

[caarts]

What zabbix agent version are you using and what is the OS of the monitord host?

[bogdar]

# zabbix_agentd -t agent.version
agent.version [s|1.6.2]

# zabbix_agentd -t system.swap.size[,used]
system.swap.size[,used] [m|ZBX_NOTSUPPORTED]

# zabbix_agentd -t system.swap.size[,pused]
system.swap.size[,pused] [d|0.003052]

# zabbix_agentd -t system.uname
system.uname [t|Linux etch-test 2.6.18-6-xen-amd64 #1 SMP Mon Jun 16 23:42:47 UTC 2008 x86_64 GNU/Linux]

[makini]

Emm...

There's no "used" mode for system.swap.size[,]
only "free" & "total" according to this (it's for 1.1x but didn't change much since, it's the same in current docs too).

I do this to see the swap usage raise:

({Default_template:system.swap.size[,total].last(0)})/({Default_template:system.swap.size[,free].last(0)})>1.1

or u can always subtract too