delta function not working properly

[rizwank]

I've got an alert that checks the total call volume of one of my SIP servers. (I want a flag if the max == min == curent for the last 15 minutes - it's an indication that the server is locked up.)

My Trigger :

{Template_HTT_SIPServer:sql_get_call_count[].delta(900)}#0

An alert I rcvd :

Latest value:
72 call(s)
AVG for 15 minutes:
99 call(s)
MAX for 15 minutes:
107 call(s)
MIN for 15 minutes:
72 call(s)

=====

So, according to page 124 of the manual, delta = Same as max()-min(), which should have equaled 35 for the above example, but instead it equaled 0, starting the trigger.

Is this a bug in Zabbix 1.6.4? (Has this been fixed in trunk?)

Thanks,
rizwan

[richlv]

i might be misunderstanding something, but looking at your trigger expression, i see negation operator, not equivalence one.
thus trigger fires whenever delta _is not_ 0.