Some time_shift troubles

[Eudald Valcarcel]

Hi there,
I'm trying to make a trigger basically reporting something like this:
if N > 1000 then check N+1(next N) > N

I've seen on support webpage that the functionality time_shift was done to compare different time-values, but i'm just collapsed into that sentence:

{host:mqueue_count[sacarino_br].last(0)}> {host:mqueue_count[sacarino_br].last(300)}/{host:mqueue_count[sacarino_br].last(300)}>1000

(mqueue_count is an item that works properly and return an integer).
Just this way, this code is supposed to:
1.- check the value of the item.
2.- after 300 seconds, check the 2nd value of the item
3.- if the first value is higher than 1000, and the second value is higher than frist value, the trigger will prompt on zabbix monitor.

Can you help me?
Thanks in advance

Eudald

[Eudald Valcarcel]

Can anyone help me with it? I've noticed that my trigger is not working as it should.

Thanks in advance,
Eudald

[Alexei]

Hi there,
I'm trying to make a trigger basically reporting something like this:
if N > 1000 then check N+1(next N) > N

Please could you rephrase it. It is not quite clear what you are trying to achieve.

[Eudald Valcarcel]

Sure, of course.

What I mean is:

I get an integer as a result of a query check (that's the item).
It's refreshed every 5 minutes.

I want to make a trigger that can work doing as shown next:

- Get the integer of the item and compare with a standard value (in this case, 1000, named N).
- Get the 5 minutes next value and compare with the result of the first step.
- If the value is higher than this result, then the trigger must prompt

Hope it's more clear.

Thanks,
Eudald

[ghoz]

you just have to think of "previous vs actual" value
rather than actual VS future value

something like (with 5 minutes interval)
item.last(0) - item.prev(0) > item.prev(0) AND item.prev(0) >1000 ?

or item.last(0) - 2 * item.prev(0) > 0 AND item.prev(0) >1000 ?


if i understand correctly, you want to know if your value more that doubled in the last 5 minutes ? I'm curious, what kind of item are you monitoring ?

[Eudald Valcarcel]

Hi Ghoz, i don't want to know if the value doubled, just if the value incremented in case the first value was 1000 or higher.

I'm using it to control a sender, to check if it's sending the mails properly.

Eudald

[ghoz]

Hi Ghoz, i don't want to know if the value doubled, just if the value incremented in case the first value was 1000 or higher.

that's not what you said :-)

Sure, of course.
- Get the integer of the item and compare with a standard value (in this case, 1000, named N).
- Get the 5 minutes next value and compare with the result of the first step.
- If the value is higher than this result, then the trigger must prompt

anyway i think
item.last(0) - item.prev(0) > 1000 will do the trick... with 5 minutes interval

if you realy want the trigger to fire if the proev calue is > 1000 AND it increased by more thant 1000,
then use somthing like
item.prev(0) > 1000 AND (item.last(0) - item.prev(0) > 1000 )

if you need to change the 1000 at the host level you can create a macro {$MAX_MAILQ_INCREASE} or something...

[Eudald Valcarcel]

I think i'm explaining too bad or my english is worst that what i thought

i don't want to check if the value was increased by 1000, just if increased from 1000 to 1001.. 2.. 3.. etc

When you talk about item.prev and item.last, are these the right commands just replacing item by the name i've given to it?

Thanks a lot!
Eudald

[ghoz]

ok,
in thins case
item.prev(0) > 1000 AND (item.last(0) > item.prev(0))

(and yes you have to replace the 'item' by your definition, and use the right syntax with {} and everything :-)