Error in calculated check item.

[mudit.gupta]

Hello All

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

Item configuration :::

Name : % free on root
Type : Calculated
Key : free.root
Formula : 100*last("vfs.fs.size[/,free]",0)/last("vfs.fs.size[/,total]",0)
Type of information : Numeric float
Units : %

This item status shows Error :: Cannot evaluate function "last(0)": item "Ubuntu-Client 10.0.4.32:vfs.fs.size[/,free]" does not exist.

May I get some help ?

Thanks
Mudit Gupta

[Semiadmin]

IMHO, there is extra "0" in your formula. The right one:

100*last("vfs.fs.size[/,free]")/last("vfs.fs.size[/,total]")

But... may be just use vfs.fs.size[/,pfree] ?

[mudit.gupta]

Hello Semiadmin

I have removed extra "0" and used ::

100*last("vfs.fs.size[/,free]")/last("vfs.fs.size[/,total]")

but same Error :: Cannot evaluate function "last(0)": item "Ubuntu-Client 10.0.4.32:vfs.fs.size[/,free]" does not exist.

Tried also :: 100*last("vfs.fs.size[/,pfree]") / last("vfs.fs.size[/,pfree]")

Error :: Cannot evaluate function "last()": item "Ubuntu-Client 10.0.4.32:vfs.fs.size[/,pfree]" does not exist.

Please help me , any one .

Thanks
Mudit

[mudit.gupta]

Dear All

Please help me on below mentioned issue.


Thanks
Mudit

[mudit.gupta]

Error in calculated check item.

Dear all members ,

Hope you all are fine.

I am facing issue with calculated check , can you please help me in this ?

Thanks
Mudit

[glebs.ivanovskis]

Error message says it all:

Cannot evaluate function "last(0)": item "Ubuntu-Client 10.0.4.32:vfs.fs.size[/,free]" does not exist.

Items you use in calculated item formula must exist!

[mudit.gupta]

Error in calculated check item.

Dear glebs.ivanovskis

Can you please explain it more "Items you use in calculated item formula must exist!" ?

Thanks
Mudit

[glebs.ivanovskis]

Which part of it don't you understand?

In your case you need to have item "vfs.fs.size[/,free]" on host "Ubuntu-Client 10.0.4.32".

[mudit.gupta]

Error in calculated check item.

Dear glebs.ivanovskis

I have created an item but still same error , please have a look at the attachment and suggest me, if anything is wrong .

Thanks
Mudit

[dimir]

"Calculated" item works on an existing other item:

• I have item A
• I create Calculated item B, that uses item A

In your case item A is "vfs.fs.size[/,free]" and it is missing.

More information can be found here.

[kloczek]

BTW using this calculated item is completely pointless as long as zabbix agent on side of vfs.fs.size[/,free] provides vfs.fs.size[/,pfree] which returns in % free space.

https://www.zabbix.com/documentation/3.2/manual/config/items/itemtypes/zabbix_agent