Using Items in the formula for calculated items

[Marvin]

Hi,

i am trying to calculate the sum of 2 items which are polled by SNMP.

For example i have:
One host called SBC.

One item called Memory which returns the used RAM in MBs.
One item called Healthscore which returns the healthscore, usually 100.

Now as a simple test i want to combine these two into 1 item using the calculated method.

I tried the following:
Formula: last("Memory")+last("Healthscore")

But it seems to fail with an error that i use the function wrong.

Does anybody know the correct syntax which i need to perform this action?

Kind regards,
Marvin

[Yello]

What are the item keys for the two snmp items?


Regards,
David

[Marvin]

Hi,

the item keys are as follows:

Memory:
Agent: SNMPv2 Agent
Key:1.3.6.1.4.1.9148.3.2.1.1.2.0
OID:1.3.6.1.4.1.9148.3.2.1.1.2.0

Healthscore:
Agent: SNMPv2 Agent
Key:1.3.6.1.4.1.9148.3.2.1.1.3.0
OID:1.3.6.1.4.1.9148.3.2.1.1.3.0

Kind regards,
Marvin

[Yello]

Hi,

the item keys are as follows:

Memory:
Agent: SNMPv2 Agent
Key:1.3.6.1.4.1.9148.3.2.1.1.2.0
OID:1.3.6.1.4.1.9148.3.2.1.1.2.0

Healthscore:
Agent: SNMPv2 Agent
Key:1.3.6.1.4.1.9148.3.2.1.1.3.0
OID:1.3.6.1.4.1.9148.3.2.1.1.3.0

Kind regards,
Marvin

Try something like this:

last("1.3.6.1.4.1.9148.3.2.1.1.2.0")+last("1.3.6.1 .4.1.9148.3.2.1.1.3.0")


Regards,
David

[Marvin]

Hi,

yes that seems to work, thanks a lot!

One more informational question, can i combine data from multiple hosts?
Like if i have 3x this configuration lets say SBC1 SBC2 and SBC3
Can i do a calculation which checks: last("SBC1:<key>")+last("SBC2:<key>")+last("SBC3:< key>")

Would that work?
Or am i limited to calculations per host?

Kind regards,
Marvin

[Yello]

Yes, that should work.

Regards,
David

[Marvin]

Yeah it worked! Thanks a lot