Weird behavior in calculated items...

[steev]

I have 2 calculated items that work. Their formulas are:

last("grpsum[\"Central\",\"vfs.fs.size[/repository,free]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository2,free]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository3,free]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository4,free]\",\"last\",\"0\"]")

and

last("grpsum[\"Central\",\"vfs.fs.size[/repository,used]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository2,used]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository3,used]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository4,used]\",\"last\",\"0\"]")

these both work fine. If clone one of them and try to add up the groupsums of vfs.fs.size[/repo(2,3,4, etc),total] like this:

last("grpsum[\"Central\",\"vfs.fs.size[/repository,total]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository2,total]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository3,total]\",\"last\",\"0\"]")+last("grpsum[\"Central\",\"vfs.fs.size[/repository4,total]\",\"last\",\"0\"]")

then it fails with the error:

[CPCentral:vfs.fs.cluster.repos.total] error: Cannot evaluate function [last()]: item [CPCentral:grpsum["Central","vfs.fs.size[/repository,total]","last","0"]] not found


I'm running 1.8.4 and thoroughly confused.

[steev]

Solution....

I had not yet created the other "vfs.fs.size[/repository*,total]" items yet for Zabbix to add up... if you want to calculate a value from other items, the items referenced in the formula must exist first.