Problems with delta() trigger and negative number

[sfr]

Hi

I use the delta() function to measure a specific item in Zabbix.

I want to trigger if the item value rose by more than 100 in the last 24 hours, and for that I use delta().

{mysql:mysql.table_count[app.errors].delta(86400)}>100

The problem I have is that it also triggers when the value has gone down by more than 100.

Is there a better way to do this?

[sfr]

I've tried doing this instead:

{mysql:mysql.table_count[app.errors].last()}-{mysql:mysql.table_count[app.errors].last(,1h)}>500

I'm a bit confused about the arguments to

last()

though – in the docs, it says that last accepts a

sec

OR

#num

parameter as the first argument, but later it says that its ignored.



So I think using "time shift" is the correct way, and leaving the first parameter empty.

Since it is impossible to actually test triggers in zabbix I don't know if this is working. Any pointers on that?

Thanks